CVE-2026-81578

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 85,6%

Kerentanan Authentication Bypass by Primary Weakness pada papercut mf, papercut ng. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 31 Agustus 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

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.

Advisory KUTIM-CSIRT

• Peringatan Keamanan: Rekapitulasi Kerentanan yang Dieksploitasi Aktif (KEV CISA) Periode 15 Agustus sampai 30 September 2026 30 Sep 2026

Rincian

Terbit di NVD

28 Agustus 2026

Terakhir diubah

14 September 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-305: Authentication Bypass by Primary Weakness

EPSS (30 hari)

85,6% peluang dieksploitasi; lebih tinggi dari 99,7% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

PaperCut NG/MF Missing Authentication for Critical Function Vulnerability

Masuk KEV

31 Agustus 2026

Tenggat CISA

14 September 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

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.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/ patch · advisory vendor
• https://github.com/rapid7/metasploit-framework/pull/21842 issue tracking · patch
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81578 patch · advisory pihak ketiga · pemerintah AS