Quick answers
- Is CVE-2026-85880 exploited in the wild?
- Yes. CVE-2026-85880 is known to be exploited in the wild, first recorded on 8 September 2026. Treat it as urgent.
- How severe is CVE-2026-85880?
- Critical severity, with a CVSS score of 7.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows <UNKNOWN>.
- Is there a fix for CVE-2026-85880?
- 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-2026-85880 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-85880?
- Check whether you run Microsoft Windows at an affected version. 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
A heap-based buffer overflow exists in Microsoft Windows Advanced Local Procedure Call (ALPC), a kernel-mode inter-process communication mechanism. The vulnerability allows a local attacker to overflow a heap buffer, potentially enabling arbitrary code execution with elevated privileges. The attack requires local access to the system but does not require user interaction or special privileges as a precondition. An attacker can exploit this flaw to achieve kernel-level code execution, leading to complete system compromise. The vulnerability is known to be actively exploited in the wild as of the publication date.
Affected products
- Microsoft Windows <UNKNOWN>
Timeline
- 2026-09-08: disclosed
- exploited: Known to be exploited in the wild