CVE-2025-21279: microsoft edge_chromium Type Confusion
CVSS: 8.8v3.1HighAnalyzed
Published 06-02-2025Last modified 26-02-2026
Vulnerability summary
CVE-2025-21279 is a high (CVSS 8.8) Type Confusion vulnerability in microsoft edge_chromium. EPSS estimates a 1.62% chance of exploitation in the next 30 days, higher than 75.7% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.62%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 06-02-2025PublishedVulnerability first disclosed.
- 26-02-2026Last modifiedVulnerability information updated.
Description
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSources2 sources · 6.5–8.8
- CVE.orgCNA6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RC:CDiffers
EPSS trend
Probability
1.62%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
0.00 pp
From 1.62% on 19-09-2026
19-09-202619-10-2026
EPSS score1.62%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft2 products
- edge_chromium< 133.0.3065.51
- microsoft edge (chromium-based)≥ 1.0.0.0, < 133.0.3065.51
1 vendor · 2 products
