Quick answers
- Is CVE-2026-65813 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-65813 being exploited in the wild.
- How severe is CVE-2026-65813?
- Medium severity, with a CVSS score of 6.5, published 11 August 2026.
- Which products and versions are affected?
- Microsoft Exchange Server.
- Is there a fix for CVE-2026-65813?
- 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-2026-65813 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-65813?
- Check whether you run Microsoft Exchange Server. 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
This vulnerability is a server-side request forgery (SSRF) in Microsoft Exchange Server that requires an authorized attacker to be present on the network. An authenticated attacker can exploit this flaw to make the Exchange server send requests to internal resources or services, potentially bypassing access controls and escalating privileges. The attack vector is network-based and requires valid credentials. A patch is expected to be available through Microsoft's security update process.
Affected products
- Microsoft Exchange Server
Timeline
- 2026-08-11: disclosed