Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-70351Microsoft WebP Image Extension Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity integer overflow in WebP Image Extension from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Integer overflow or wraparound in Microsoft WebP Image Extension allows an unauthorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | WebP Image Extension | 1.0.0.0 – before 1.2.31.0 |
Weakness: CWE-190, CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Microsoft WebP Image Extension Remote Code Execution Vulnerability vendor-advisory, patch