CVE-2026-70351: CWE-190: Integer Overflow or Wraparound in Microsoft WebP Image Extension
Description
CVE-2026-70351 is a high-severity integer overflow or wraparound vulnerability in the Microsoft WebP Image Extension. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability affects versions 1.0.0.0 up to but not including 1.2.31.0. An official fix is available from Microsoft.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
WebP Image Extension
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-70351 involves an integer overflow or wraparound in the Microsoft WebP Image Extension. This flaw enables remote code execution by an unauthorized attacker when processing specially crafted WebP images. The affected versions include 1.0.0.0 and all versions greater than or equal to 1.0.0.0 but less than 1.2.31.0. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for the WebP Image Extension to remediate this vulnerability. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70351 for detailed patch information and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T00:04:56.037Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70351","vendor":"Microsoft"}]
Threat ID: 6aa0453bacd9273b49fa9b95
Added to database: 09/08/2026, 17:26:19 UTC
Last enriched: 10/16/2026, 21:40:36 UTC
Last updated: 10/22/2026, 01:15:25 UTC
Views: 33
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