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CVE-2025-54574 is a heap buffer overflow in Squid URN handling caused by incorrect buffer management while processing URN-related Trivial-HTTP responses. A malicious remote server can send a crafted response with oversized headers, causing corruption of Squid heap memory. The issue affects Squid releases through 6.3 and is fixed in version 6.4.
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No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced as addressed by the TuxCare CentOS 7 CLSA advisory. The supplied content does not provide technical vulnerability details.
A patched Squid proxy vulnerability that can leak server memory, potentially exposing credentials or other sensitive data, triggered via malformed Trivial-HTTP responses over URN.
A heap buffer overflow in Squid URN processing that can lead to denial of service, information disclosure, or potentially remote code execution via malformed oversized HTTP headers in Trivial-HTTP responses.
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.