{"schema":"threatline.record/2","record":{"id":"CVE-2026-81578","aliases":[],"summary":"PaperCut NG/MF Missing Authentication for Critical Function Vulnerability","details":"PaperCut NG/MF contains a missing authentication for critical function vulnerability which allows an unauthenticated remote attacker to modify certain system configurations. This vulnerability can be chained with CVE-2026-82078.","categories":["Unclassified"],"product":"NG/MF","vendor":"PaperCut","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-81578","source_modified_at":"2026-09-13T23:15:33.997Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"PaperCut MF/NG","vendor":"PaperCut","versions":[{"status":"affected","version":"0","lessThan":"24.1.10","versionType":"semver"},{"status":"affected","version":"25.0.0","lessThan":"25.0.13","versionType":"semver"},{"status":"affected","version":"26.0.0","lessThan":"26.0.5","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-81578","source_modified_at":"2026-09-13T23:15:33.997Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PaperCut MF/NG","ecosystem":null},"version":"24.1.10","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-81578","source_modified_at":"2026-09-13T23:15:33.997Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PaperCut MF/NG","ecosystem":null},"version":"25.0.13","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-81578","source_modified_at":"2026-09-13T23:15:33.997Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PaperCut MF/NG","ecosystem":null},"version":"26.0.5","basis":"first unaffected version stated in the CVE record"}],"cvss":8.8,"severity":"High","kev":{"listed":true,"date_added":"2026-08-31","due_date":"2026-09-14","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.85581,"percentile":0.99726,"score_date":"2026-10-23"},"published_at":"2026-08-28T11:39:45.402Z","modified_at":"2026-09-13T23:15:33.997Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-81578","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-09-13T23:15:33.997Z"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/papercut_ng_external_user_lookup_rce.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-27"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-81578.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-81578","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Metasploit","Nuclei","EPSS"],"references":[{"source":"CVE List","url":"https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81578","source":"CISA KEV"},{"source":"CVE List","url":"https://github.com/rapid7/metasploit-framework/pull/21842","tags":["exploit"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81578","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"partial","assessed_at":"2026-08-28T00:00:00+00:00"},"exploits":[{"source":"Metasploit","kind":"Exploit module","name":"PaperCut NG/MF Unauthenticated RCE (CVE-2026-81578 + CVE-2026-82078)","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/papercut_ng_external_user_lookup_rce.rb","date":"2026-08-27","added":"2026-09-02","check":true},{"source":"Nuclei","kind":"Scanner template","name":"PaperCut NG/MF <=26.0.4 - Unauthenticated ConfigEditor Access via Tapestry Complex-Direct","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-81578.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-13T23:15:33.997Z","content_hash":"c667ab0fdea12d1db8626a9e727204d22b617c8ec5352946f7f279d77b9a7fa1"}}