October 12, 2026

CVE Watchtower

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CVE-2026-81578NVD

Vulnerability Summary

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.
Severity Level
HIGH(8.8)
Published Date
Aug 28, 2026
Last Modified
Sep 13, 2026
PoC
Available(Metasploit, Nuclei)
Exploitation Status
ACTIVE
EPSS Score (30-Day)
85.58%Probability
Root Weakness (CWE)
CWE-305: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 8.8 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)Low
Integrity (Vulnerable System)High
Availability (Vulnerable System)Low
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions
  • PaperCut PaperCut MF/NG < 24.1.10
  • PaperCut PaperCut MF/NG >= 25.0.0 and < 25.0.13
  • PaperCut PaperCut MF/NG >= 26.0.0 and < 26.0.5
Patched Versions
  • PaperCut PaperCut MF/NG 24.1.10
  • PaperCut PaperCut MF/NG 25.0.13
  • PaperCut PaperCut MF/NG 26.0.5
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💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References