Quick answers
- Is CVE-2026-81353 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81353 being exploited in the wild.
- How severe is CVE-2026-81353?
- High severity, with a CVSS score of 7.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Codecs Library.
- Is there a fix for CVE-2026-81353?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-81353 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-81353?
- Check whether you run Microsoft Heif Image Extension or Microsoft Windows Codecs Library. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a heap-based buffer overflow in the Windows Codecs Library, a core Windows component responsible for encoding and decoding images and multimedia formats. An attacker with local access to the system can trigger the overflow by providing specially crafted input to the affected codec, leading to arbitrary code execution in the context of the application using the library. The attack does not require elevated privileges or network access, only the ability to run code or influence input on the local system. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows Codecs Library
Timeline
- 2026-09-08: disclosed