Threat Intelligence

Urgent: PaperCut Print Software Under Active Attack — Patch Now

The Hacker News · 28 Aug 2026

Key Takeaway If your business uses PaperCut NG or MF, apply the emergency patch immediately and monitor systems for suspicious activity.

PaperCut, a widely used print management software provider, has warned customers that a serious security flaw in its PaperCut NG and PaperCut MF products is being actively exploited by cybercriminals. The company confirmed the vulnerability affects all versions of the software and said it is aware of confirmed customer incidents linked to the attacks.

In response, PaperCut has released an emergency patch for versions 25 and 26, urging all customers to apply it as soon as possible. The company stated it is treating the situation with the 'highest priority,' signalling the severity of the threat. Zero-day vulnerabilities like this are especially dangerous because attackers can exploit them before a fix is available, leaving organisations exposed even if they follow good security practices.

Businesses using PaperCut software — including many small and medium organisations that rely on it for shared printing environments — should treat this as an urgent action item. Delayed patching could allow attackers to gain unauthorised access to internal networks through compromised print servers.

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Summarised by CISO AI from The Hacker News. We link back to every original so you can read it yourself.