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CVE-2026-87707ImportantFix has a known issueEoPLocal

Windows Fax and Scan Service Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Heap-based buffer overflow in Windows Fax and Scan Service allows an authorized attacker to elevate privileges locally.

Severity
Important
CVSS base score
7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Elevation of Privilege
EPSS, next 30 days
0.2%Higher than 15.6% of scored CVEs · FIRST model run 25 Oct 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Not assessed
Publicly disclosed
No
Customer action
Required: apply the update
Component
Windows Fax and Scan Service
Weakness
CWE-122: Heap-based Buffer Overflow
Issued by
Microsoft
Published
13 Oct 2026 · October 2026
Last revised
13 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
LowAC:L
Privileges required
LowPR:L
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

10 KBs
KBTypeRestartApplies toKnown issuesOther CVEs
KB5122871 Security UpdateRequiredWindows Server 2025, Windows Server 2025 (Server Core installation)MitigatedUSB audio devices might fail to start or produce no soundAll CVEs in KB5122871
KB5122876 Security UpdateRequiredWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019 and 1 moreMitigatedUSB audio devices might fail to start or produce no soundAll CVEs in KB5122876
KB5122878 Security UpdateRequiredWindows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems and 3 moreMitigatedUSB audio devices might fail to start or produce no soundAll CVEs in KB5122878
KB5122880 Security UpdateRequiredWindows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based SystemsMitigatedUSB audio devices might fail to start or produce no soundAll CVEs in KB5122880
KB5122882 Security UpdateRequiredWindows Server 2022, Windows Server 2022 (Server Core installation)ResolvedUSB audio devices might fail to start or produce no soundAll CVEs in KB5122882
KB5123065 Security UpdateRequiredWindows Server 2012, Windows Server 2012 (Server Core installation)None listedAll CVEs in KB5123065
KB5123066 Security UpdateRequiredWindows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)None listedAll CVEs in KB5123066
KB5123099 Security UpdateRequiredWindows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016 and 1 moreMitigatedUSB audio devices might fail to start or produce no soundAll CVEs in KB5123099
KB5124008 Security UpdateRequiredWindows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 moreMitigatedUSB audio devices might fail to start or produce no soundResolvedDomain-joined devices might lose their secure trust relationship with the domainAll CVEs in KB5124008
KB5124012 Security UpdateRequiredWindows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based SystemsMitigatedUSB audio devices might fail to start or produce no soundResolvedDomain-joined devices might lose their secure trust relationship with the domainAll CVEs in KB5124012

Affected products

ESU, Windows
30 affected products

What changed

First observed 14 Oct 2026
  1. 25 Oct 2026 · 17:12:51 UTC EPSS0.2%; scored 24 Oct 2026 → 0.2%; scored 25 Oct 2026
  2. 25 Oct 2026 · 01:34:18 UTC EPSS0.2%; scored 23 Oct 2026 → 0.2%; scored 24 Oct 2026
  3. 23 Oct 2026 · 15:51:28 UTC EPSS0.2%; scored 22 Oct 2026 → 0.2%; scored 23 Oct 2026
  4. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  5. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  6. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  7. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  8. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  9. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  10. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  11. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  12. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
Show 12 more recent changes
  1. 23 Oct 2026 · 08:31:50 UTCSource coverage: first-epss Current → Incomplete
  2. 23 Oct 2026 · 08:31:50 UTCSource coverage: cisa-kev Current → Incomplete
  3. 23 Oct 2026 · 08:31:50 UTCSource coverage: msrc-cvrf Current → Incomplete
  4. 22 Oct 2026 · 17:33:15 UTCEPSS 0.2%; scored 21 Oct 2026 → 0.2%; scored 22 Oct 2026
  5. 21 Oct 2026 · 21:47:24 UTCEPSS 0.2%; scored 20 Oct 2026 → 0.2%; scored 21 Oct 2026
  6. 20 Oct 2026 · 20:53:31 UTCEPSS 0.2%; scored 19 Oct 2026 → 0.2%; scored 20 Oct 2026
  7. 19 Oct 2026 · 15:12:40 UTCEPSS 0.2%; scored 18 Oct 2026 → 0.2%; scored 19 Oct 2026
  8. 18 Oct 2026 · 14:54:30 UTCEPSS 0.2%; scored 16 Oct 2026 → 0.2%; scored 18 Oct 2026
  9. 18 Oct 2026 · 14:54:30 UTCLink: October 2026 → /security?release=2026-Oct#cves
  10. 16 Oct 2026 · 16:13:25 UTCEPSS 0.2%; scored 15 Oct 2026 → 0.2%; scored 16 Oct 2026
  11. 15 Oct 2026 · 21:30:54 UTCEPSS 0.2%; scored 14 Oct 2026 → 0.2%; scored 15 Oct 2026
  12. 15 Oct 2026 · 01:07:54 UTCEPSS Not scored → 0.2%; scored 14 Oct 2026

The most recent 100 field changes are listed. Complete recorded revisions are kept separately.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

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Explore global source statements, affected packages and advisory history for CVE-2026-87707. The catalog has a separate collection scope from Microsoft release records.

cve-program · CVE-2026-87707

Published

Windows 10 Version 1607

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 10 Version 1607",
                    "platforms": [
                        "32-bit Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.14393.0",
                            "lessThan": "10.0.14393.9512",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 10 Version 1809

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 10 Version 1809",
                    "platforms": [
                        "32-bit Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.17763.0",
                            "lessThan": "10.0.17763.9245",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 10 Version 21H2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 10 Version 21H2",
                    "platforms": [
                        "32-bit Systems",
                        "ARM64-based Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.19044.0",
                            "lessThan": "10.0.19044.7725",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 10 Version 22H2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 10 Version 22H2",
                    "platforms": [
                        "32-bit Systems",
                        "ARM64-based Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.19045.0",
                            "lessThan": "10.0.19045.7725",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 11 version 23H2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 11 version 23H2",
                    "platforms": [
                        "ARM64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.22631.0",
                            "lessThan": "10.0.22631.7582",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 11 Version 23H2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 11 Version 23H2",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.22631.0",
                            "lessThan": "10.0.22631.7582",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 11 Version 24H2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 11 Version 24H2",
                    "platforms": [
                        "ARM64-based Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.26100.0",
                            "lessThan": "10.0.26100.9445",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 11 Version 25H2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 11 Version 25H2",
                    "platforms": [
                        "ARM64-based Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.26200.0",
                            "lessThan": "10.0.26200.9445",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows 11 version 26H1

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows 11 version 26H1",
                    "platforms": [
                        "ARM64-based Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.28000.0",
                            "lessThan": "10.0.28000.2954",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2012

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2012",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "6.2.9200.0",
                            "lessThan": "6.2.9200.26349",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2012 (Server Core installation)

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2012 (Server Core installation)",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "6.2.9200.0",
                            "lessThan": "6.2.9200.26349",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2012 R2

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2012 R2",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "6.3.9600.0",
                            "lessThan": "6.3.9600.23398",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2012 R2 (Server Core installation)

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2012 R2 (Server Core installation)",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "6.3.9600.0",
                            "lessThan": "6.3.9600.23398",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2016

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2016",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.14393.0",
                            "lessThan": "10.0.14393.9512",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2016 (Server Core installation)

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2016 (Server Core installation)",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.14393.0",
                            "lessThan": "10.0.14393.9512",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2019

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2019",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.17763.0",
                            "lessThan": "10.0.17763.9245",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2019 (Server Core installation)

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2019 (Server Core installation)",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.17763.0",
                            "lessThan": "10.0.17763.9245",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2022

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2022",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.20348.0",
                            "lessThan": "10.0.20348.5622",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2025

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2025",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.26100.0",
                            "lessThan": "10.0.26100.33438",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Windows Server 2025 (Server Core installation)

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Microsoft",
                    "product": "Windows Server 2025 (Server Core installation)",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "10.0.26100.0",
                            "lessThan": "10.0.26100.33438",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 25 Oct 21:06 UTC · 271 of 271 readable · 269 fully read · documentation 464/464 current

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