If you run a small business or manage IT for a school, a routine print management tool called PaperCut just became more important to watch. In the last 24 hours, two newly disclosed vulnerabilities in PaperCut have been tied to active intrusions, and government bodies have added those CVEs to the KEV catalog. Here’s what that means and what you can do today.
What happened
Security researchers and government advisories describe exploitation related to PaperCut vulnerabilities CVE-2026-82078 and CVE-2026-81578, with the U.S. Cybersecurity and Infrastructure Security Agency (CISA) placing these CVEs in the Known Exploited Vulnerabilities (KEV) catalog. The result so far is evidence of intrusions tied to affected installations. Vendors and security teams are tracking the situation as more details emerge.
What this means for attackers is that unpatched PaperCut deployments can be a foothold for unauthorized access. If you run PaperCut NG or PaperCut MF, review vendor guidance and your patch status. Details may evolve as investigations continue.
Why it matters
- Regular users: If your organization uses PaperCut for print management, a vulnerable installation could be a stepping stone for broader access.
- Small businesses: Patching timelines often slip. This issue highlights why timely updates and patch verification matter for business continuity.
- Creators and IT-minded readers: It’s a reminder to map critical software assets, monitor for exploit indicators, and keep an eye on KEV updates for prioritization.
- Cybersecurity teams: Align defense with KEV prioritization, validate that fixes exist, and test patches in a controlled environment before broad deployment.
Practical steps you can take now
- Identify whether PaperCut is deployed in your environment and which versions you run. Check with your IT team or PaperCut’s official advisories for affected releases and available fixes.
- Review the KEV catalog and vendor advisories for CVE-2026-82078 and CVE-2026-81578. Prioritize patching if your systems are affected.
- Ensure backups are current and tested. If exploitation is possible, a restore point can be crucial even if patching takes time.
- Check access controls for PaperCut and related services. Enforce strong authentication, enable MFA where possible, and audit admin accounts for unusual activity.
- Review network segmentation around print-management components. Limit exposure to sensitive internal networks.
- Enable enhanced logging and monitor for unusual login, file access, or printing activity that could indicate compromise.
- If you work with managed service providers (MSPs), coordinate with clients to verify patch status and contingency plans.
- Test patches in a staging environment before rolling out widely to reduce the risk of downtime.
- Stay informed: subscribe to vendor security notices and trusted outlets to catch updates quickly as details evolve.
Final thoughts
Staying proactive with patching and vigilant monitoring is the best defense against these kinds of vulnerabilities. If PaperCut is part of your tech stack, treat these CVEs as a reminder to verify your patch status and keep incident-response plans ready. Stay safe out there.