# CVE-2026-65777: Microsoft Windows Active Directory inadequate encryption strength bypass

Source: https://junglewise.ai/threats/cve-2026-65777-microsoft-windows-active-directory-inadequate-encryption-strength  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-65777 · Severity: medium · CVSS 5.3 · Published 2026-08-11

Windows Active Directory, a core directory service that manages user identities and access control across enterprise networks, contains a weakness in its encryption implementation. An authorized attacker on the network could exploit this flaw to bypass a security feature, potentially compromising access controls or exposing sensitive authentication data.

Technologies: [Microsoft Windows Active Directory](https://junglewise.ai/threats/technologies/windows-active-directory). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-65777 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-65777 being exploited in the wild.

**How severe is CVE-2026-65777?** Medium severity, with a CVSS score of 5.3, published 11 August 2026.

**Which products and versions are affected?** Microsoft Windows Active Directory <UNKNOWN>.

**Is there a fix for CVE-2026-65777?** 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-2026-65777 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-65777?** Check whether you run Microsoft Windows Active Directory 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

This vulnerability stems from inadequate encryption strength in Windows Active Directory's security mechanisms. An authorized attacker with network access can bypass a security feature by exploiting weak encryption parameters. The attack requires prior authorization to the system and network reachability. Successful exploitation could lead to circumvention of intended security controls. A patch is available from Microsoft.

## Affected products

- Microsoft Windows Active Directory <UNKNOWN>

## Timeline

- 2026-08-11: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65777](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65777)

## Related threats

- [Windows Active Directory command injection privilege escalation](https://junglewise.ai/threats/cve-2026-123387-improper-neutralization-of-special-elements-used-in-a-command)
- [Microsoft Windows Active Directory stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-119948-stack-based-buffer-overflow-in-windows-active-directory-allows)
- [Microsoft Windows Active Directory denial of service](https://junglewise.ai/threats/cve-2026-105559-no-cwe-for-this-issue-in-windows-active-directory-allows-an)