{"basis":"claimed","id":"CVE-2025-54574","name":"Squid's URN Handling can lead to Buffer Overflow","vendorProject":"squid-cache","product":"squid","publishedAt":"2025-08-01","cvss":{"score":9.3,"severity":"CRITICAL","version":"3.1"},"exploited":null,"epss":{"score":0.22133,"percentile":0.97671,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"blocks","firstOn":"2025-08-07","daysToRule":6},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"none","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"none","firstOn":null,"daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"title":"Squid's URN Handling can lead to Buffer Overflow","description":"Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.","cwes":["CWE-122"],"vendors":[{"vendor":"cloudflare","status":"blocks","basis":"claimed","firstOn":"2025-08-07","firstIsNew":true,"daysToRule":6,"daysAtMost":null,"freePlan":false,"claims":[{"id":"15c463f202dff945fc36e6201b9e9c8bf936be0038ecd6aae682c3b90ab63e15","cve_id":"CVE-2025-54574","vendor":"cloudflare","product":"Cloudflare Managed Ruleset","rule_id":"e76e65f5a3aa43f49e0684a6baec057a","rule_name":"Squid - Buffer Overflow - CVE:CVE-2025-54574","change":"new","default_action":"Block","published_on":"2025-08-07","source_url":"https://developers.cloudflare.com/changelog/post/2025-08-07-emergency-waf-release/","source_title":"WAF Release - 2025-08-07 - Emergency","excerpt":"Squid - Buffer Overflow - CVE:CVE-2025-54574. Previous action: N/A. New action: Block. This is a New Detection","first_seen_at":"2026-11-02T21:00:16.350Z"}]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-02T21:17:16.628Z","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial"},"measured":[],"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-21","posts":0},{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0},{"day":"2026-11-03","posts":0}],"top_posts":[],"exploit_repositories":[]}}