CVE-2026-42626 Denial of service in n/a
An unauthenticated remote attacker can cause a persistent denial of service on HP ENVY printers by exhausting session threads via TCP connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42626?
CVE-2026-42626 is a medium-severity denial of service vulnerability in n/a, published on 22 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
HP ENVY 5000 series printers VERBASPP1N003.2237A.00 do not properly manage concurrent TCP connections to port 9100 (JetDirect/RAW printing). An unauthenticated remote attacker on the same network can establish a persistent connection to port 9100 and send keep-alive packets, causing the printer's session threads to remain locked in a waiting state. The firmware lacks connection timeouts and concurrent session limits, resulting in a persistent Denial of Service (DoS) that renders the printer unresponsive to all user commands and print jobs. Physical intervention (manual restart) is required to restore functionality, and the attack can be immediately re-initiated.
Which versions are affected by CVE-2026-42626?
How do I fix CVE-2026-42626?
No fix has been published for CVE-2026-42626 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-42626 being exploited?
There is no known exploitation of CVE-2026-42626 in the wild and no public exploit code.
Sources
Also known as GHSA-wghp-f8qf-wg62.