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CVE-2025-59295 is a heap-based buffer overflow vulnerability in the Internet Explorer/MSHTML component of Windows. The flaw can be triggered by specially crafted data delivered over the network, causing memory corruption in heap-allocated structures within the browser rendering engine. Successful exploitation may allow arbitrary code execution in the context of the affected process without prior authorization.
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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.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A buffer overflow vulnerability in Windows MSHTML (CVE-2025-59295) that has been targeted by malware posing as proof-of-concept exploits on GitHub.
A high-profile vulnerability for which fake PoC exploits are being distributed on GitHub as part of a malware campaign. The actual technical details of the vulnerability are not described in this content, but it is being used as a lure for malware distribution.
A security flaw for which fake PoC exploits are being distributed to deliver WebRAT malware.
A critical heap-based buffer overflow vulnerability in Internet Explorer, with a CVSS score of 8.8, for which attackers are distributing fake exploit code on GitHub as a lure for malware delivery.
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.