Quick answers
- Is CVE-2026-118149 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-118149 being exploited in the wild.
- How severe is CVE-2026-118149?
- High severity, with a CVSS score of 8.8, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Exchange Server <UNKNOWN>.
- Is there a fix for CVE-2026-118149?
- 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-2026-118149 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-118149?
- Check whether you run Microsoft Exchange Server 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
The vulnerability is an improper control of code generation flaw in Microsoft Exchange Server that permits code injection. An authenticated attacker can exploit this over the network to execute arbitrary code on the affected system. The vulnerability requires prior authentication but allows remote code execution once an attacker gains authorized access.
Affected products
- Microsoft Exchange Server <UNKNOWN>
Timeline
- 2026-11-10: disclosed