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CVE-2026-49172 is a heap-based buffer overflow vulnerability in the Windows FTP Service. The flaw is remotely reachable over the network and can be triggered by sending crafted malicious requests to a vulnerable FTP server. Available reporting indicates the issue is exploitable without authentication and does not require user interaction. Successful exploitation can result in arbitrary code execution in the context of the affected service. Reported affected systems include Windows Server 2019, Windows Server 2022, and Windows Server 2025 when the FTP Service is enabled.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.