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CVE-2026-81956 is an out-of-bounds read vulnerability in Microsoft Office Excel. An unauthorized attacker who exploits the flaw locally can execute code. Microsoft addressed the vulnerability in its September 2026 Excel security updates, including MS26-5002914 (KB5002914).
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Excel vulnerability referenced by the security-update plugin; technical details are not provided.
A vulnerability affecting Microsoft Office Online Server and/or Microsoft Office Web Apps addressed by the September 8, 2026 Microsoft bulletin.
Microsoft Office Excel out-of-bounds-read local code-execution vulnerability.
A Microsoft Excel vulnerability addressed by MS26-5002914; no technical details are supplied.
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.