CVE-2026-66314 json
Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
published 2026-08-03 3 mo ago modified 2026-11-01 7 d ago also EUVD-2026-52526
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
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
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
Affected products
- Microsoft Microsoft Edge (Chromium-based)
Classification
- Weakness
-
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-66314
vendor-advisory, patch
Sources
- CVE List CVE-2026-66314
- NVD CVE-2026-66314
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