CVE•Published 2026-08-28•Modified 2026-09-14•4 articles on news•5 live references•NVD data
CVE-2026-81578Papercut · Papercut_mf
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
75
Exploit Prediction Scoring System · top 25% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-08-28
Modified 2026-09-14
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-81578Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Papercut Papercut Mf"All exposed Papercut Papercut Mf instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Papercut Mf"HTTP body or banner mentions "Papercut Mf" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-81578Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-81578Censys host search filtered to this CVE id.
grep.app
CVE-2026-81578Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-81578GitHub code search for direct mentions.
Google dork
"CVE-2026-81578" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (7)
CVE-2026-815787 repos
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cybershujin/Threat-Actors-use-of-Artifical-IntelligenceHTML
Ostorlab/agent_asteroidPython
Agent responsible for detecting remote vulnerabilities, a robust scanner.
yora1928/PaperCut-CVE-2026-81578-82078Python
Security research tool for PaperCut CVE-2026-81578 & CVE-2026-82078
virologi-info/papercut-toolkitPython
#PaperCut CVE-2026-81578 + CVE-2026-82078 Defense Toolkit 2 3 A **defensive** toolkit to check and understand exposure to the chained
barmi/cve-patch-auditorGo
Audit CVE impact, patch status, remediation progress, and verification results across systems.
watchtowrlabs/watchTowr-vs-PaperCut-WT-2026-0143Python