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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: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  6. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  7. 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)
  8. 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 (47)

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

  1. 13 Nov 2026 · 12:10:20 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. 13 Nov 2026 · 12:10:20 UTC Source coverage: public-exploit-codeIncomplete → Current
  3. 13 Nov 2026 · 12:10:20 UTC Source coverage: first-epssIncomplete → Current
  4. 13 Nov 2026 · 12:10:20 UTC Source coverage: msrc-cvrfIncomplete → Current
  5. 13 Nov 2026 · 11:07:20 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  6. 13 Nov 2026 · 11:07:20 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  7. 13 Nov 2026 · 11:07:20 UTC Source coverage: first-epssCurrent → Incomplete
  8. 13 Nov 2026 · 11:07:20 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  9. 13 Nov 2026 · 02:00:04 UTC EPSS0.3%; scored 10 Nov 2026 → 0.3%; scored 12 Nov 2026
  10. 10 Nov 2026 · 18:32:11 UTC EPSS0.3%; scored 9 Nov 2026 → 0.3%; scored 10 Nov 2026
  11. 9 Nov 2026 · 22:24:37 UTC EPSS0.3%; scored 8 Nov 2026 → 0.3%; scored 9 Nov 2026
  12. 8 Nov 2026 · 15:16:05 UTC EPSS0.3%; scored 7 Nov 2026 → 0.3%; scored 8 Nov 2026
  13. 7 Nov 2026 · 16:12:44 UTC EPSS0.3%; scored 6 Nov 2026 → 0.3%; scored 7 Nov 2026
  14. 6 Nov 2026 · 19:15:37 UTC EPSS0.3%; scored 5 Nov 2026 → 0.3%; scored 6 Nov 2026
  15. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  16. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  17. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  18. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  19. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  20. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  21. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  22. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  23. 5 Nov 2026 · 23:42:03 UTC EPSS0.3%; scored 4 Nov 2026 → 0.3%; scored 5 Nov 2026
  24. 5 Nov 2026 · 02:36:20 UTC EPSS0.3%; scored 3 Nov 2026 → 0.3%; scored 4 Nov 2026
  25. 4 Nov 2026 · 03:04:37 UTC EPSS0.3%; scored 2 Nov 2026 → 0.3%; scored 3 Nov 2026
  26. 3 Nov 2026 · 01:53:36 UTC EPSS0.3%; scored 1 Nov 2026 → 0.3%; scored 2 Nov 2026
  27. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  28. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  29. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  30. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  31. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  32. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  33. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  34. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  35. 2 Nov 2026 · 00:36:51 UTC EPSS0.3%; scored 31 Oct 2026 → 0.3%; scored 1 Nov 2026
  36. 31 Oct 2026 · 18:22:15 UTC EPSS0.3%; scored 30 Oct 2026 → 0.3%; scored 31 Oct 2026
  37. 30 Oct 2026 · 18:02:45 UTC EPSSNo EPSS score collected → 0.3%; scored 30 Oct 2026
  38. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  39. 29 Oct 2026 · 20:19:26 UTC EPSSNot scored → No EPSS score collected
  40. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  41. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  42. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  43. 29 Oct 2026 · 15:26:56 UTC Revision noteInformation published. → CWE added. Informational change only.
  44. 29 Oct 2026 · 15:26:56 UTC Last revised27 Oct 2026 07:00 UTC → 29 Oct 2026 07:00 UTC
  45. 29 Oct 2026 · 15:26:56 UTC WeaknessNot stated → CWE-347: Improper Verification of Cryptographic Signature
  46. 29 Oct 2026 · 15:26:56 UTC ExploitabilityNot assessed → Exploitation Less Likely
  47. 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

Exploitation and risk

Source status

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

Which CVEs have scores here?

This view includes predictions for CVE identifiers explicitly listed in public NuGet advisories. Microsoft release pages have their own prediction coverage. Check source status for the scope and latest checks.

No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.

Risk history

Compare earlier KEV listings and daily EPSS scores. Advisory wording and affected versions have a separate history.

When does an EPSS score appear as a change?

A prediction change is reported when EPSS rises from below 10% to 10% or higher. Other daily score changes remain in this history.

Advisory history

6 saved versions

See how the publisher's advisory changed over time. Each link opens the version saved at that time. The publisher's update date can differ from the date shown here.

How advisory history works

Each link identifies one complete publisher record. History can include advisories that previously shared an identifier; an identifier removed by a publisher no longer establishes a current relationship. A historical link shows only that record and earlier saved versions. Failed checks and unchanged reads do not create new versions.

10 Nov 2026 22:21:22 UTC

Microsoft Edge (Chromium-based) Spoofing Vulnerability

cve-program · CVE-2026-88078 · Published

31 Oct 2026 20:04:47 UTC

Microsoft Edge (Chromium-based) Spoofing Vulnerability

cve-program · CVE-2026-88078 · Published

31 Oct 2026 18:04:47 UTC

Microsoft Edge (Chromium-based) Spoofing Vulnerability

cve-program · CVE-2026-88078 · Published

30 Oct 2026 22:45:26 UTC

Microsoft Edge (Chromium-based) Spoofing Vulnerability

cve-program · CVE-2026-88078 · Published

30 Oct 2026 15:45:26 UTC

Microsoft Edge (Chromium-based) Spoofing Vulnerability

cve-program · CVE-2026-88078 · Published

29 Oct 2026 17:12:12 UTC

Microsoft Edge (Chromium-based) Spoofing Vulnerability

cve-program · CVE-2026-88078 · Published

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

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