PaperCut Multiple Vulnerabilities
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
CSIRTS triage
- What
- Multiple unspecified vulnerabilities exist in PaperCut.
- Who is affected
- All PaperCut users are potentially affected; exact version scope is not provided.
- Urgency
- Urgency cannot be determined without additional details on the specific vulnerabilities and their severity.
- Action
- Consult the PaperCut security advisory for affected versions and apply available patches immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://www.hkcert.org/security-bulletin/papercut-multiple-vulnerabilities_20260831
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-82078Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 58% of all EPSS-scored CVEs.
- Exploitation confirmedCVE-2026-81578Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 53% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-82078 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-81578 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedPaperCut security advisory (AV26-858) – Update 2cccs
- criticalexploitedCISA Adds Two Known Exploited Vulnerabilities to Catalogcisa
- criticalexploitedCVE-2026-81578: PaperCut NG/MF Missing Authentication for Critical Function Vulnerabilitycisa-kev
- criticalexploitedCVE-2026-82078: PaperCut NG/MF Unsafe Reflection Vulnerabilitycisa-kev
- criticalexploitedCVE-2026-82078: An unsafe dynamic class loading vulnerability exists in the database connection utilities of P…nvd
- criticalexploitedCVE-2026-81578: An improper access control vulnerability exists in the web management interface of PaperCut MF…nvd
- unknownexploitedNCSC-2026-0334 [1.00] [M/H] Vulnerabilities patched in PaperCut MF and PaperCut NG from PaperCutncsc-nl
- unknownexploitedMultiple vulnerabilities in Papercut (August 28, 2026)cert-fr-avis
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