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UNKNOWN CISA KEV

CVE-2026-81578

CVSS v3

—

Unknown

EPSS Score

0.4 %

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

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 Known Exploited Vulnerability

Date Added
2026-08-31
Patch Due Date
2026-09-14
Ransomware Use
Unknown

Technical details

Published
2026-08-28
Last Modified
2026-08-29

Frequently asked questions

What is CVE-2026-81578?

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.

Is CVE-2026-81578 actively exploited?

Yes. CVE-2026-81578 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-14.

What is the CVSS score for CVE-2026-81578?

A CVSS score has not been assigned to CVE-2026-81578 yet.

Is CVE-2026-81578 affecting your environment?

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