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CVE-2026-88078ModerateSpoofingNetworkRevised 29 Oct

Microsoft Edge (Chromium-based) Spoofing Vulnerability

No KEV listing collectedCVSS 4.3Fix not stated
MSRC advisory NVD CVE.org

Assessment

Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Severity
Moderate
CVSS base score
4.3
Impact
Spoofing
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Less Likely
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
0.3%FIRST forecast dated 12 Nov 2026, for the following 30 days · FIRST percentile 22.1% · about EPSS
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Microsoft Edge (Chromium-based)
Weakness
CWE-347: Improper Verification of Cryptographic Signature
Issued by
Microsoft
Published
27 Oct 2026 · October 2026
Last revised
29 Oct 2026CWE added. Informational change only.
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
RequiredUI:R
Scope
UnchangedS:U
Confidentiality
NoneC:N
Integrity
LowI:L
Availability
NoneA:N

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

Browser
1 affected product

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. Publisher revision note: Information published. → CWE added. Informational change only.
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 (39)

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

  1. 13 Nov 2026 · 02:00:04 UTC EPSS0.3%; scored 10 Nov 2026 → 0.3%; scored 12 Nov 2026
  2. 10 Nov 2026 · 18:32:11 UTC EPSS0.3%; scored 9 Nov 2026 → 0.3%; scored 10 Nov 2026
  3. 9 Nov 2026 · 22:24:37 UTC EPSS0.3%; scored 8 Nov 2026 → 0.3%; scored 9 Nov 2026
  4. 8 Nov 2026 · 15:16:05 UTC EPSS0.3%; scored 7 Nov 2026 → 0.3%; scored 8 Nov 2026
  5. 7 Nov 2026 · 16:12:44 UTC EPSS0.3%; scored 6 Nov 2026 → 0.3%; scored 7 Nov 2026
  6. 6 Nov 2026 · 19:15:37 UTC EPSS0.3%; scored 5 Nov 2026 → 0.3%; scored 6 Nov 2026
  7. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  8. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  9. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  10. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  11. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  12. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  13. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  14. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  15. 5 Nov 2026 · 23:42:03 UTC EPSS0.3%; scored 4 Nov 2026 → 0.3%; scored 5 Nov 2026
  16. 5 Nov 2026 · 02:36:20 UTC EPSS0.3%; scored 3 Nov 2026 → 0.3%; scored 4 Nov 2026
  17. 4 Nov 2026 · 03:04:37 UTC EPSS0.3%; scored 2 Nov 2026 → 0.3%; scored 3 Nov 2026
  18. 3 Nov 2026 · 01:53:36 UTC EPSS0.3%; scored 1 Nov 2026 → 0.3%; scored 2 Nov 2026
  19. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  20. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  21. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  22. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  23. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  24. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  25. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  26. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  27. 2 Nov 2026 · 00:36:51 UTC EPSS0.3%; scored 31 Oct 2026 → 0.3%; scored 1 Nov 2026
  28. 31 Oct 2026 · 18:22:15 UTC EPSS0.3%; scored 30 Oct 2026 → 0.3%; scored 31 Oct 2026
  29. 30 Oct 2026 · 18:02:45 UTC EPSSNo EPSS score collected → 0.3%; scored 30 Oct 2026
  30. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  31. 29 Oct 2026 · 20:19:26 UTC EPSSNot scored → No EPSS score collected
  32. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  33. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  34. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  35. 29 Oct 2026 · 15:26:56 UTC Revision noteInformation published. → CWE added. Informational change only.
  36. 29 Oct 2026 · 15:26:56 UTC Last revised27 Oct 2026 07:00 UTC → 29 Oct 2026 07:00 UTC
  37. 29 Oct 2026 · 15:26:56 UTC WeaknessNot stated → CWE-347: Improper Verification of Cryptographic Signature
  38. 29 Oct 2026 · 15:26:56 UTC ExploitabilityNot assessed → Exploitation Less Likely
  39. 29 Oct 2026 · 15:26:56 UTC SummaryMicrosoft Edge (Chromium-based) Spoofing Vulnerability → Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Explore global source statements, affected packages and advisory history for CVE-2026-88078. The catalog has a separate collection scope from Microsoft release records.

More advisories, affected versions and source history

cve-program · CVE-2026-88078

Published

Microsoft Edge (Chromium-based)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Microsoft",
                    "product": "Microsoft Edge (Chromium-based)",
                    "versions": [
                        {
                            "version": "1.0.0.0",
                            "lessThan": "156.0.4314.42",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

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

ChangeIntel

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Sources read 13 Nov 10:02 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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