Quick answers
- Is CVE-2026-111309 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111309 being exploited in the wild.
- How severe is CVE-2026-111309?
- High severity, with a CVSS score of 8.8, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Office Outlook.
- Is there a fix for CVE-2026-111309?
- 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-2026-111309 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-111309?
- Check whether you run Microsoft Office Outlook. 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 use-after-free or invalid pointer dereference vulnerability in Microsoft Office Outlook allows remote code execution via network attack vector. The vulnerability requires network connectivity but does not explicitly require user interaction or prior authentication; a crafted message or connection could trigger the memory safety issue and execute attacker code with Outlook's privileges.
Affected products
- Microsoft Office Outlook
Timeline
- 2026-11-10: disclosed