Loading vulnerability…
CVE-2026-78512 is a numeric truncation error in Microsoft Office Word. Improper truncation of a numeric value can produce unsafe program behavior that an unauthorized attacker may leverage to execute code in the context of the affected Word process. The vulnerability is addressed by Microsoft’s September 2026 Office security updates.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced by the Microsoft Word Products C2R September 2026 security-update plugin; no technical details are provided.
Microsoft Office Word numeric-truncation remote code-execution vulnerability.
A Microsoft Excel vulnerability addressed by the September 8, 2026 MS26-5002914 update. The supplied content provides no technical flaw description.
A numeric truncation error in Microsoft Office Word that could allow an unauthorized attacker to execute code remotely over a network.
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.