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KEV Entry

CVE-2026-81578

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2026-81578

2026-08-31 00:00 UTC

Timestamps

2026-08-31

2026-08-31

Scope

PaperCut NG/MF Missing Authentication for Critical Function Vulnerability | Affected: PaperCut / NG/MF | Description: 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. | Required action: 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. | Due date: 2026-09-14 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-81578

References
  • {'id': 'CVE-2026-81578', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-81578'}

f0c2d6c9-3315-46e7-b7f0-478e2eea4b90

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-08-31 16:00 UTC

2026-08-31 16:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-306"
  ],
  "date_added": "2026-08-31",
  "due_date": "2026-09-14",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "NG/MF",
  "vendorProject": "PaperCut",
  "vulnerabilityName": "PaperCut NG/MF Missing Authentication for Critical Function Vulnerability"
}
 -
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