medium Known exploitedREV. 01

CVE-2026-20805Windows Desktop Window Manager — local information disclosure

The Desktop Window Manager in Windows exposes information to a user who should not see it, readable by anyone already signed in on the machine. Microsoft does not say what information that is.

YOUR NEXT MOVE

Install the Microsoft update for this CVE now; it pairs with a type confusion flaw in the same component, so confirm both updates actually landed.

Read the risk

THE VITAL STATS
CVSS score
5.5/ 10
CVSS v3.1
EPSS probability
5%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2026-01-13
Added to KEV
2026-01-13
Exploit published
Not recorded
Confidence
medium
Kill chain
collection
MITRE ATT&CK
—
Severity
medium

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

Attacker needsAn existing local account on the machine.

Behind the card

3 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2026-20805 · CRDS 0.1 · Issued 2026-09-24