Quick answers
- Is CVE-2026-65790 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-65790 being exploited in the wild.
- How severe is CVE-2026-65790?
- High severity, with a CVSS score of 7.8, published 11 August 2026.
- Which products and versions are affected?
- Microsoft Windows Message Queuing <UNKNOWN>.
- Is there a fix for CVE-2026-65790?
- 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-2026-65790 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-65790?
- Check whether you run Microsoft Windows Message Queuing 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 Windows Message Queuing due to improper bounds checking when processing messages. An authorized attacker who can authenticate to the Message Queuing service can trigger this overflow to corrupt heap memory and achieve local privilege escalation. The vulnerability requires valid authentication credentials, limiting the attack surface to users with existing access to the system. Exploitation allows an attacker to run code with SYSTEM privileges. A security patch from Microsoft is expected to be available.
Affected products
- Microsoft Windows Message Queuing <UNKNOWN>
Timeline
- 2026-08-11: disclosed