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CVE-2026-58600ImportantEoPLocal

HEVC Video Extensions Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.

Severity
Important
CVSS base score
7.8
Impact
Elevation of Privilege
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Less Likely
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
0.5%FIRST forecast dated 10 Nov 2026, for the following 30 days · FIRST percentile 40.7% · about EPSS
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Microsoft Windows Codecs Library
Weakness
CWE-122: Heap-based Buffer Overflow
Issued by
Microsoft
Published
8 Sep 2026 · September 2026
Last revised
8 Sep 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
RequiredUI:R
Scope
UnchangedS:U
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Windows
24 affected products
  • HEVC Video Extensions
  • HEVC Video Extensions for Licensed Applications
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for 32-bit Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for 32-bit Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2019
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2019 (Server Core installation)
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2022
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2022 (Server Core installation)
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2025
  • HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation)

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  5. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
  6. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  7. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (61)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 10 Nov 2026 · 18:32:11 UTC EPSS0.5%; scored 9 Nov 2026 → 0.5%; scored 10 Nov 2026
  2. 9 Nov 2026 · 22:24:37 UTC EPSS0.5%; scored 8 Nov 2026 → 0.5%; scored 9 Nov 2026
  3. 8 Nov 2026 · 15:16:05 UTC EPSS0.5%; scored 7 Nov 2026 → 0.5%; scored 8 Nov 2026
  4. 7 Nov 2026 · 16:12:44 UTC EPSS0.5%; scored 6 Nov 2026 → 0.5%; scored 7 Nov 2026
  5. 6 Nov 2026 · 19:15:37 UTC EPSS0.5%; scored 5 Nov 2026 → 0.5%; scored 6 Nov 2026
  6. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  7. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  8. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  9. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  10. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  11. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  12. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  13. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  14. 5 Nov 2026 · 23:42:03 UTC EPSS0.5%; scored 4 Nov 2026 → 0.5%; scored 5 Nov 2026
  15. 5 Nov 2026 · 02:36:20 UTC EPSS0.5%; scored 3 Nov 2026 → 0.5%; scored 4 Nov 2026
  16. 4 Nov 2026 · 03:04:37 UTC EPSS0.5%; scored 2 Nov 2026 → 0.5%; scored 3 Nov 2026
  17. 3 Nov 2026 · 01:53:36 UTC EPSS0.5%; scored 1 Nov 2026 → 0.5%; scored 2 Nov 2026
  18. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  19. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  20. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  21. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  22. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  23. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  24. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  25. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  26. 2 Nov 2026 · 00:36:51 UTC EPSS0.5%; scored 31 Oct 2026 → 0.5%; scored 1 Nov 2026
  27. 31 Oct 2026 · 18:22:15 UTC EPSS0.5%; scored 30 Oct 2026 → 0.5%; scored 31 Oct 2026
  28. 30 Oct 2026 · 18:02:45 UTC EPSS0.5%; scored 29 Oct 2026 → 0.5%; scored 30 Oct 2026
  29. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  30. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  31. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  32. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  33. 29 Oct 2026 · 18:33:30 UTC EPSS0.5%; scored 28 Oct 2026 → 0.5%; scored 29 Oct 2026
  34. 28 Oct 2026 · 20:00:33 UTC EPSS0.5%; scored 27 Oct 2026 → 0.5%; scored 28 Oct 2026
  35. 27 Oct 2026 · 15:48:13 UTC EPSS0.5%; scored 26 Oct 2026 → 0.5%; scored 27 Oct 2026
  36. 26 Oct 2026 · 23:57:09 UTC EPSS0.5%; scored 25 Oct 2026 → 0.5%; scored 26 Oct 2026
  37. 25 Oct 2026 · 17:12:51 UTC EPSS0.5%; scored 24 Oct 2026 → 0.5%; scored 25 Oct 2026
  38. 25 Oct 2026 · 01:34:18 UTC EPSS0.5%; scored 23 Oct 2026 → 0.5%; scored 24 Oct 2026
  39. 23 Oct 2026 · 15:51:28 UTC EPSS0.5%; scored 22 Oct 2026 → 0.5%; scored 23 Oct 2026
  40. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  41. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  42. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  43. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  44. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  45. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  46. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  47. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  48. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  49. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  50. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  51. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  52. 22 Oct 2026 · 17:33:15 UTC EPSS0.5%; scored 21 Oct 2026 → 0.5%; scored 22 Oct 2026
  53. 21 Oct 2026 · 21:47:24 UTC EPSS0.5%; scored 20 Oct 2026 → 0.5%; scored 21 Oct 2026
  54. 20 Oct 2026 · 20:53:31 UTC EPSS0.5%; scored 19 Oct 2026 → 0.5%; scored 20 Oct 2026
  55. 19 Oct 2026 · 15:12:40 UTC EPSS0.5%; scored 18 Oct 2026 → 0.5%; scored 19 Oct 2026
  56. 18 Oct 2026 · 14:54:30 UTC EPSS0.5%; scored 16 Oct 2026 → 0.5%; scored 18 Oct 2026
  57. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  58. 16 Oct 2026 · 16:13:25 UTC EPSS0.5%; scored 15 Oct 2026 → 0.5%; scored 16 Oct 2026
  59. 15 Oct 2026 · 21:30:54 UTC EPSS0.5%; scored 14 Oct 2026 → 0.5%; scored 15 Oct 2026
  60. 15 Oct 2026 · 01:07:54 UTC EPSS0.5%; scored 13 Oct 2026 → 0.5%; scored 14 Oct 2026
  61. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current

Explore global source statements, affected packages and advisory history for CVE-2026-58600. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-58600

Published

HEVC Video Extensions Elevation of Privilege Vulnerability

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.

Source published
8 Sep 2026 17:12:19 UTC
Source modified
10 Nov 2026 21:31:04 UTC
Observed here
10 Nov 2026 23:21:22 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

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 11 Nov 14:12 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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