{"cve":"CVE-2026-81578","nvd":{"published":"2026-08-28T16:18:29.600","modified":"2026-09-14T00:16:56.207","status":"Analyzed","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.","cvss_v4":{"vector":"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","score":8.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-305"],"references":["https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/","https://github.com/rapid7/metasploit-framework/pull/21842","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81578"],"products":["papercut:papercut_mf","papercut:papercut_ng"],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-81578","score":0.84734,"percentile":0.99707,"date":"2026-11-01"},"kev":{"cve":"CVE-2026-81578","date_added":"2026-08-31","due_date":"2026-09-14","vendor":"PaperCut","product":"NG/MF","known_ransomware":false},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}