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CVE-2026-20805 is an information disclosure vulnerability in Microsoft Windows Desktop Window Manager (DWM). The flaw allows a local authenticated attacker to disclose sensitive information from user-mode memory, specifically a section address associated with a remote ALPC port. Public reporting indicates the issue leaks memory address information rather than directly providing code execution, making it primarily useful for weakening exploit mitigations such as address randomization and supporting follow-on exploitation. Microsoft reported the vulnerability as actively exploited in the wild at the time of patch release, and affected platforms include multiple supported Windows 10, Windows 11, and Windows Server versions.
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No valid public exploits. Mallory filtered out 5 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
110 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A DWM information disclosure vulnerability mentioned only as another flaw patched in the same KB update.
A previously exploited Desktop Window Manager information disclosure vulnerability referenced for historical context as part of a broader pattern of DWM exploitation.
Microsoft vulnerability (type/product not specified in the provided content snippet) reported as actively exploited in the wild.
Windows Desktop Window Manager (DWM) information disclosure that leaks a user-mode memory address via ALPC, likely used to aid exploit chains (e.g., bypassing mitigations) rather than as a standalone exploit.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.