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CVE-2026-20805

Desktop Window Manager Information Disclosure Vulnerability

Exploited in the wild. In CISA KEV since 2026‑01‑13. Fixed versions are out.

CVSS 3.15.5MediumEPSS percentile94th7.5% chance in 30 daysCISA KEVListedsince 2026-01-13, due 2026-02-03
Public exploit: 1 sourceFix5 products9 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows 10 Version 1607Affected: ≥ 10.0.14393.0, < 10.0.14393.8783Upgrade to: 10.0.14393.8783Affected: ≥ 10.0.17763.0, < 10.0.17763.8276Upgrade to: 10.0.17763.8276Affected: ≥ 10.0.19044.0, < 10.0.19044.6809Upgrade to: 10.0.19044.6809Affected: ≥ 10.0.19045.0, < 10.0.19045.6809Upgrade to: 10.0.19045.6809Stated by: CVE record
  • Microsoft Windows 11 version 23H2Affected: ≥ 10.0.22631.0, < 10.0.22631.6491Upgrade to: 10.0.22631.6491Affected: ≥ 10.0.26100.0, < 10.0.26100.7623Upgrade to: 10.0.26100.7623Affected: ≥ 10.0.26200.0, < 10.0.26200.7623Upgrade to: 10.0.26200.7623Stated by: CVE record
  • Microsoft Windows Server 2012Affected: ≥ 6.2.9200.0, < 6.2.9200.25868Upgrade to: 6.2.9200.25868Stated by: CVE record
  • Microsoft Windows Server 2012 R2Affected: ≥ 6.3.9600.0, < 6.3.9600.22968Upgrade to: 6.3.9600.22968Stated by: CVE record
  • Microsoft Windows Server 2016Affected: ≥ 10.0.14393.0, < 10.0.14393.8783Upgrade to: 10.0.14393.8783Stated by: CVE record

Versions as the sources state them. 3 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened. 2 further articles named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

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

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS94th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2026-01-13.

US federal agencies must remediate by 2026-02-03.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public exploits

1 source with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

7.5% chance of exploitation activity in the next 30 days, which ranks it in the 94th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Attention now

Rising.

Lifecycle

The patch came 51 days before any public exploit.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. Public exploit / PoCsource: github-poc
  4. Patch availablerecord updated
  5. Added to CISA KEVpublished, weakness classified, att&ck mapped

Affected products

And 45 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 5.5 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity NoneNo integrity impact
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 2 more references. See all after sign-in

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next exploited one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Windows 10 Version 1607, not every advisory. This one: actively exploited.