{"basis":"claimed","id":"CVE-2026-81578","name":"PaperCut NG/MF Missing Authentication for Critical Function Vulnerability","vendorProject":"PaperCut","product":"NG/MF","publishedAt":"2026-08-28","cvss":{"score":8.8,"severity":"HIGH","version":"4.0"},"exploited":{"kevAdded":"2026-08-31","dueDate":"2026-09-14","ransomware":false},"epss":{"score":0.84734,"percentile":0.99707,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"none","firstOn":null,"daysToRule":null},"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":"rule","firstOn":"2026-10-21","daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"title":"PaperCut MF/NG: Authentication Bypass","description":"An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote requests targeting administrative functions can trigger backend actions prior to the  completion of access validation checks. This allows an unauthenticated remote attacker to modify certain system configurations.","cwes":["CWE-305"],"vendors":[{"vendor":"cloudflare","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"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":"rule","basis":"claimed","firstOn":"2026-10-21","firstIsNew":false,"daysToRule":null,"daysAtMost":54,"freePlan":false,"claims":[{"id":"b16aab47896df8c8e204245f0c52f6ee3b8774ca4c15d0f09f1d7da5739aa8c4","cve_id":"CVE-2026-81578","vendor":"f5","product":"Attack signatures","rule_id":"200013222","rule_name":"PaperCut NG/MF Authentication Bypass","change":"updated","default_action":null,"published_on":"2026-10-21","source_url":"https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog","source_title":"F5 Distributed Cloud attack signatures changelog","excerpt":"Updated: signature 200013222 \"PaperCut NG/MF Authentication Bypass\" (Authentication/Authorization Attacks, risk High), systems: Other Web Server. References: CVE-2026-81578, CVE-2026-82078.","first_seen_at":"2026-11-02T21:00:23.656Z"}]},{"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":"2026-11-02T23:17:39.095Z","cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","ssvc":{"exploitation":"active","automatable":"yes","technicalImpact":"partial"},"measured":[{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 1, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:02:57.000Z","verdict":"partial","templateId":"CVE-2026-81578","templatePath":"http/cves/2026/CVE-2026-81578.yaml","requests":3,"blockedRequests":1,"rules":["942290"],"note":"","requestDetail":[{"method":"GET","path":"/app?…","status":200,"blocked":false,"rules":[]},{"method":"GET","path":"/app","status":200,"blocked":false,"rules":[]},{"method":"POST","path":"/app?…","status":403,"blocked":true,"rules":["942290"]}]},{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 2, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:03:28.000Z","verdict":"partial","templateId":"CVE-2026-81578","templatePath":"http/cves/2026/CVE-2026-81578.yaml","requests":3,"blockedRequests":1,"rules":["942290"],"note":"","requestDetail":[{"method":"GET","path":"/app?…","status":200,"blocked":false,"rules":[]},{"method":"GET","path":"/app","status":200,"blocked":false,"rules":[]},{"method":"POST","path":"/app?…","status":403,"blocked":true,"rules":["942290"]}]}],"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-20","posts":0},{"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}],"top_posts":[],"exploit_repositories":[]}}