Loading vulnerability…
CVE-2026-35421 is a heap-based buffer overflow vulnerability in the Windows Graphics Device Interface (GDI). The flaw is triggered when GDI parses specially crafted Enhanced Metafile (EMF) records and fails to properly validate record data size against heap buffer boundaries during rendering. This can result in an out-of-bounds write that corrupts adjacent heap memory. The vulnerability is reachable through applications that rely on Windows GDI for rendering, including Microsoft Paint, when a user opens or otherwise processes a malicious EMF image. Successful exploitation can lead to arbitrary code execution in the security context of the user who processed the file.
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 remote code execution vulnerability in Windows Graphics Device Interface (GDI) involving specially crafted Enhanced Metafile (EMF) files opened in Windows Paint.
A Windows GDI remote code execution vulnerability exploitable via a malicious EMF image opened in Microsoft Paint.
A critical remote code execution vulnerability in Windows GDI caused by a heap-based buffer overflow triggered by opening a crafted EMF file in Microsoft Paint.
A remote code execution vulnerability in Windows GDI that can be exploited via malicious EMF files opened in Microsoft Paint.
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.