Out-of-bounds Read in Windows GDI+ Bitmap Parsing
CVE-2026-25181 is an information disclosure vulnerability in Microsoft Windows GDI/GDI+ bitmap image parsing. The flaw is described as an out-of-bounds read triggered by crafted data in a bitmap header during processing by the GDI library. Successful exploitation can cause the vulnerable component to read memory outside the intended buffer and disclose sensitive information from the current process context. Public reporting also notes that, while the issue is primarily an information disclosure bug, it may be useful as part of a vulnerability chain with another flaw to facilitate arbitrary code execution.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
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.