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CVE-2026-85880 is an Important-rated local elevation-of-privilege vulnerability in Windows Advanced Local Procedure Call (ALPC). The flaw is a heap-based buffer overflow, also associated with CWE-908 (Use of Uninitialized Resource). A low-privileged attacker able to execute code within an AppContainer can exploit the vulnerability to escape the AppContainer sandbox and elevate privileges on the affected Windows system. Microsoft reported exploitation in the wild prior to public disclosure.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
38 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An actively exploited Windows ALPC elevation-of-privilege flaw that can enable an attacker in an AppContainer to escape its restricted environment and gain higher privileges.
A Microsoft security-update vulnerability added to CISA's Known Exploited Vulnerabilities catalog; the content does not specify the affected product or vulnerability type.
A CVSS 7.8 Windows Advanced Local Procedure Call privilege-escalation vulnerability that was actively exploited before public disclosure and addressed by Microsoft.
An actively exploited Microsoft Windows vulnerability affecting a Windows messaging system.
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.