Critical

Attackers Chain Two PaperCut Flaws to Execute Code Without Authentication

The Hacker News

August 28, 2026 at 5:12 PM

Actively Exploited

Overview

Attackers are taking advantage of a recently patched vulnerability in PaperCut NG and MF software, allowing them to execute arbitrary code without needing authentication. This flaw gives unauthorized users remote access to the application's trusted configuration, which can be exploited to run Java code within the system. PaperCut has responded by releasing an emergency fix to address this issue and enhance security measures. Organizations using these PaperCut products should act quickly to apply the latest updates to safeguard their systems from potential exploitation. Failure to patch could leave systems vulnerable to significant security breaches.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: PaperCut NG, PaperCut MF
Action Required: Emergency fix released; users should update to the latest version as per PaperCut's guidance.
Timeline: Newly disclosed

Original Article Summary

Malicious actors are exploiting a newly patched security flaw in PaperCut NG and MF to execute arbitrary code on susceptible instances, as the company released a fresh emergency fix with additional hardening. "This vulnerability gives an unauthenticated attacker remote control over PaperCut's trusted configuration, which could be used to execute arbitrary Java code inside the application's

Impact

PaperCut NG, PaperCut MF

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Emergency fix released; users should update to the latest version as per PaperCut's guidance.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability, Patch.

Read Original Article

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