Quick answers
- Is CVE-2026-81955 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81955 being exploited in the wild.
- How severe is CVE-2026-81955?
- High severity, with a CVSS score of 8.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Graphics Component.
- Is there a fix for CVE-2026-81955?
- 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-2026-81955 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-81955?
- Check whether you run Microsoft Graphics Component. 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 Microsoft's Graphics Component, allowing remote code execution (RCE) over a network without requiring user authentication. The flaw is in how the component handles specially crafted input, failing to validate buffer boundaries before writing data to heap memory. An attacker can send a malicious network request or craft a file that triggers the overflow, overwriting adjacent heap structures to redirect execution flow and run arbitrary code with the privileges of the affected application. Microsoft has released security updates to patch this vulnerability.
Affected products
- Microsoft Graphics Component
Timeline
- 2026-09-08: disclosed