CVE-2026-66311 json
Microsoft Edge (Chromium-based) Tampering Vulnerability
published 2026-08-03 3 mo ago modified 2026-11-01 7 d ago also EUVD-2026-52531
- cvss
- 6.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
Patch / fix
- Microsoft Microsoft Edge (Chromium-based) 151.0.4129.59
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Microsoft Microsoft Edge (Chromium-based)
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-66311
vendor-advisory, patch
Sources
- CVE List CVE-2026-66311
- NVD CVE-2026-66311
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