CVE-2026-34473 Denial of service in n/a
Unauthenticated attackers can cause a denial of service on ZTE routers by sending oversized POST requests to the web interface, requiring a reboot to recover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34473?
CVE-2026-34473 is a high-severity denial of service vulnerability in n/a, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unauthenticated DoS in ZTE H8102E, H168N, H167A, H199A, H288A, H198A, H267A, H267N, H268A, H388X, H196A, H369A, H268N, H208N, H367N, H181A, and H196Q. A denial-of-service condition can be triggered against the router's web interface by sending an oversized application/x-www-form-urlencoded POST body. After triggering, the management interface may become unresponsive until the device is rebooted. This may affect any firmware version prior to 2022 (reporter observation). The supplier stated that devices are not vulnerable since 2021-03-23; operator firmware may vary.
Weakness: CWE-400
Which versions are affected by CVE-2026-34473?
How do I fix CVE-2026-34473?
No fix has been published for CVE-2026-34473 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-2026-34473 being exploited?
There is no known exploitation of CVE-2026-34473 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-vx9f-9xjj-7h22.