PaperCut released a second emergency patch last Friday, for two vulnerabilities in its NG and MF print management servers that attackers are already exploiting, after security researchers demonstrated that the vendor's first fix could be bypassed.

The two flaws work as a chain. CVE-2026-81578, rated 8.8 on the CVSS scale, is an improper access control weakness in the PaperCut web management interface that lets unauthenticated remote requests reach administrative functions before the server finishes validating access.

CVE-2026-82078, rated 9.4, is an unsafe dynamic class-loading flaw in the product's database utilities. The application loads database driver classes without checking them a...