CVE & CISA-KEV Catalog

CVE-2026-65777

HIGH
5.3
CVSS v3
NVD

Description

Inadequate encryption strength in Windows Active Directory allows an authorized attacker to bypass a security feature over a network.

CWE-326

How to fix

Remediation Available
Windows 11 Version 23H2Windows
Install:KB5120240Microsoft
Windows 11 Version 24H2Windows
Install:KB5120994Microsoft
Install:KB5121003Microsoft
Windows 11 Version 25H2Windows
Install:KB5120994Microsoft
Install:KB5121003Microsoft
Windows 11 Version 26H1Windows
Install:KB5121000Microsoft
Windows 11 version 26H1Windows
Install:KB5121000Microsoft
Windows Server 2022Windows
Install:KB5120242Microsoft
Install:KB5120229Microsoft
Windows Server 2022 (Server Core installation)Windows
Install:KB5120229Microsoft
Install:KB5120242Microsoft
Windows Server 2025Windows
Install:KB5120228Microsoft
Install:KB5120233Microsoft
Windows Server 2025 (Server Core installation)Windows
Install:KB5120228Microsoft
Install:KB5120233Microsoft

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityHigh
AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C

Exploit Intelligence

0.29%probability of exploitation in 30 days
21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Related Vulnerabilities

Other CWE-326 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2014-0224High7.495%-Fix
CVE-2017-1000486Critical9.894%KEVFix
CVE-2013-2566Medium5.984%-Fix
CVE-2017-11317Critical9.884%KEV-
CVE-2018-18325High7.574%KEV-
CVE-2018-15811High7.574%KEV-

Common questions

How do I fix CVE-2026-65777?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-65777 being actively exploited?

Not that we know of. CVE-2026-65777 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.29% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.

How severe is CVE-2026-65777?

CVE-2026-65777 has a CVSS v3 base score of 5.3, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-65777 affect?

Published advisories record a fix for Windows 11 Version 23H2 (Windows), Windows 11 Version 24H2 (Windows), Windows 11 Version 25H2 (Windows), Windows 11 Version 26H1 (Windows), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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CVE-2026-65777 severity badge

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-14.