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CVE-2026-20805

Microsoft Windows Information Disclosure

5.5 MEDIUMActively exploited (CISA KEV)EPSS 7.20%
  1. Published13 Jan 2026
  2. Added to CISA KEV13 Jan 2026
  3. Remediation due3 Feb 2026
Actively exploited (CISA KEV)

Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.

Added to KEV: 13 Jan 2026Federal remediation due: 3 Feb 2026

Description

Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

Microsoft Windows 10 1607< 10.0.14393.8783
Microsoft Windows 10 1809< 10.0.17763.8276
Microsoft Windows 10 21h2< 10.0.19044.6809
Microsoft Windows 10 22h2< 10.0.19045.6809
Microsoft Windows 11 23h2< 10.0.22631.6491
Microsoft Windows 11 24h2< 10.0.26100.7623
Microsoft Windows 11 25h2< 10.0.26200.7623
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016< 10.0.14393.8783
Microsoft Windows Server 2019< 10.0.17763.8276
Microsoft Windows Server 2022< 10.0.20348.4648
Microsoft Windows Server 2022 23h2< 10.0.25398.2092
Microsoft Windows Server 2025< 10.0.26100.7623

Remediation

Fixed in
Microsoft Windows 10 1607≥ 10.0.14393.8783
Microsoft Windows 10 1809≥ 10.0.17763.8276
Microsoft Windows 10 21h2≥ 10.0.19044.6809
Microsoft Windows 10 22h2≥ 10.0.19045.6809
Microsoft Windows 11 23h2≥ 10.0.22631.6491
Microsoft Windows 11 24h2≥ 10.0.26100.7623
Microsoft Windows 11 25h2≥ 10.0.26200.7623
Microsoft Windows Server 2016≥ 10.0.14393.8783
Microsoft Windows Server 2019≥ 10.0.17763.8276
Microsoft Windows Server 2022≥ 10.0.20348.4648

References

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Frequently asked

Is CVE-2026-20805 being actively exploited?

Yes. CVE-2026-20805 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 13 Jan 2026.

How severe is CVE-2026-20805?

CVE-2026-20805 has a CVSS 3.1 base score of 5.5, rated medium. EPSS estimates a 7.20% probability of exploitation.

Which products are affected by CVE-2026-20805?

Affected products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, and 8 more.

How do I fix CVE-2026-20805?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1607 10.0.14393.8783, Microsoft Windows 10 1809 10.0.17763.8276, Microsoft Windows 10 21h2 10.0.19044.6809 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-20805 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.