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TI-2025-15364 Aliases CVE-2025-21399GHSA-78xr-cmr3-fxq9

Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

Priority LOW 36CWE-426Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00684 52nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Microsoft Edge Update Setup (Microsoft): 1.3.195.43

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Edge Update Setup1.0.0.0 to before 1.3.195.431.3.195.43Patch availableCNA
  • Microsoft Edge Update Setup VendorMicrosoft Affected 1.0.0.0 to before 1.3.195.43 Fixed in 1.3.195.43 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:edge_update:*:*:*:*:*:*:*:*before 1.3.195.43VulnerableMicrosoft
  • cpe:2.3:a:microsoft:edge_update:*:*:*:*:*:*:*:* Versions before 1.3.195.43 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Edge Update Setup (Microsoft) Fixed in 1.3.195.43

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Edge Update SetupFixed 1.3.195.43 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-21399
  2. 2026-10-03 Alias added: GHSA-78xr-cmr3-fxq9

References

Exploit 2

Patch 1

  • TI-2025-29765 Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability CVSS 3.1HIGH 8.8
  • TI-2025-21206 Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences