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CVE-2023-27351Vulnerability

PaperCut NG/MF Improper Authentication Vulnerability

Exploited in the wildCISA added it to its Known Exploited Vulnerabilities list on .

Reported by 2 independent sources · first reported by Huntress · last reported

Last reported 15 days ago

CISA KEVAdded 20 Apr 2026
Fix due 4 May 2026
Used by ransomware: knownCISA KEV catalogue
EPSS78.1%
higher than 99% of CVEsFIRST EPSS, as of 22 Oct 2026

What the reports say

2 reports, newest first · the exact sentence from each

  1. “…t an attractive target for APTs and ransomware gangs, as proven by several vulnerabilities previously exploited in the wild (such as CVE-2023-27351 and CVE-2023-27350).”

    watchTowr LabsVendor
    Death By A Thousand PaperCuts (PaperCut Pre-Auth RCE Chain and Patch Bypasses WT-2026-0141-0144/CVE-2026-82077/CVE-2026-82078/CVE-2026-81578)

  2. “These threats have been tagged by the Zero Day Initiative as ZDI-CAN-19226 (CVE-2023-27351) and ZDI-CAN-18987 (CVE-2023-27350).”

    HuntressVendor
    Critical Vulnerabilities in PaperCut Print Management Software

Indicators reported together

named in the same reports
Copy these 16 indicators · defanged

Also named with it: CVE-2023-27350, CVE-2026-81578, CVE-2026-82078, CVE-2026-82077

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