Exploitation timeline
Threadlinqs has recorded 6 PaperCut CVEs published between and . The busiest month was 2026-08 (3 new CVEs). 4 of them (67%) are listed in CISA KEV, which means exploitation in the wild has been confirmed.
Most exploited vulnerabilities
Ranked with CISA KEV listings first, then EPSS exploit probability, then CVSS score. Showing 6 of 6 tracked PaperCut CVEs.
- CVE-2023-27350critical 9.8KEVRansomwareEPSS 100%
- CVE-2026-81578critical 9.8KEVEPSS 85.6%
- CVE-2023-27351high 7.5KEVRansomwareEPSS 78.1%
- CVE-2026-82078critical 9.1KEVEPSS 63.5%
- CVE-2026-82077high 7.3EPSS 0.7%
- CVE-2026-8794medium 6.9EPSS 0.7%
Products affected
Threadlinqs normalises CPE and CNA product records across all 6 CVEs; 4 distinct PaperCut products are affected. The most frequently affected:
- MF/NG 2 CVEs
- Mf 2 CVEs
- NG/MF 2 CVEs
- Ng 2 CVEs
Threat activity
6 tracked threat campaigns reference PaperCut products or exploit PaperCut CVEs:
- Cl0p Ransomware MFT Attack Pattern: Multi-Year Zero-Day Campaigns Against File Transfer and Enterprise Software (2020-2025)HIGH
- PaperCut NG/MF Actively Exploited Zero-Day Vulnerability Affects All Supported Versions (No CVE Assigned)CRITICAL
- PaperCut NG/MF Chained Zero-Day RCE (CVE-2026-82078 & CVE-2026-81578) Under Active ExploitationCRITICAL
- LockBit 5.0 Ransomware Extortion Claim Against US Bank (U.S. Bancorp)HIGH
- Proofpoint AI Era Ransomware Report: 37% of Paying Victims Face Repeat Extortion DemandsMEDIUM
- Storm-1175 Medusa Ransomware Zero-Day Exploitation Campaign (CVE-2026-23760, CVE-2025-10035)CRITICAL
Threat actors targeting PaperCut
Named threat actors attributed to campaigns that involve PaperCut products or CVEs, with the number of linked campaigns:
How to prioritise PaperCut patching
This order follows the data Threadlinqs holds for PaperCut, not a generic severity checklist:
- 4 of 6 PaperCut CVEs (67%) are in CISA KEV: treat them as actively exploited and remediate them first, starting with CVE-2023-27350, CVE-2026-81578, CVE-2023-27351.
- 2 CVEs are known to be used in ransomware campaigns; patch these ahead of other KEV entries on internet-facing systems.
- Outside KEV, the highest EPSS scores are CVE-2026-82077 (0.7%), CVE-2026-8794 (0.7%).
- 3 CVEs score Critical and 2 High on CVSS v3 (maximum 9.8, average 8.4); sequence these after KEV and high-EPSS items.
- 4 CVEs have a public exploit or proof of concept recorded, which shortens the time from disclosure to attack.
About this data
Vendor attribution comes from the CNA and CPE product records of each CVE, folded to one vendor name; CVSS, EPSS and KEV status are read from the Threadlinqs CVE catalog; campaign and actor links come from tracked threat records. Counts reflect the data as of 2026-10-14 and refresh daily.