PaperCut · NG/MF
CVE-2026-81578
PaperCut MF/NG: Authentication Bypass
Qué es
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.
CISA: 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.
Qué hacer
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.
Plazo para las agencias federales de EE. UU.: 14 de septiembre de 2026
- Añadida a la lista de CISA
- 31 de agosto de 2026
- Publicada
- 28 de agosto de 2026
- Gravedad
- Alto 8,8 CVSS 4.0
- Probabilidad de ataques en los próximos 30 días (EPSS)
- 84% entre el 0,3% superior de todas las vulnerabilidades conocidas
- Debilidad
- CWE-306
- Más detalles
- NVD · CVE.org · CISA
Todas las referencias (1)
Más fallos explotados de PaperCut
| Añadido | Vulnerabilidad | Producto | Gravedad | Prob. de ataque |
|---|---|---|---|---|
| 31 ago 2026 | Unsafe Reflection | NG/MF | Crítica 9,4 | 61% |
| 20 abr 2026 | Improper Authentication | NG/MF | Alto 8,2 | 78% |
| 28 jul 2025 | Cross-Site Request Forgery (CSRF) | NG/MF | Alto 8,4 | 29% |
| 21 abr 2023 | Improper Access Control | MF/NG | Crítica 9,8 | >99,9% |
Fuentes: Known Exploited Vulnerabilities (CISA, dominio público), CVE records (cve.org) y EPSS (FIRST). La probabilidad de ataque es la estimación EPSS de que alguien intente explotar el fallo en los próximos 30 días.