CVE-2025-9443 Tenda CH22 editUserName formeditUserName buffer overflow
Remote attackers can trigger a buffer overflow in the Tenda CH22 router's username editing function, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-9443?
CVE-2025-9443 is a high-severity memory corruption vulnerability in Tenda CH22, published on 26 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in Tenda CH22 1.0.0.1. This vulnerability affects the function formeditUserName of the file /goform/editUserName. Executing manipulation of the argument new_account can lead to buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2025-9443?
It affects 1 product.
Products include Tenda Ch22 Firmware.
How do I fix CVE-2025-9443?
No fix has been published for CVE-2025-9443 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-9443 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9443 exists.
Other vulnerabilities in Tenda CH22
- CVE-2025-11418 Tenda CH22 HTTP Request AdvSetWrlsafeset formWrlsafeset stack-based overflow
- CVE-2025-11423 Tenda CH22 SafeEmailFilter formSafeEmailFilter memory corruption
- CVE-2026-5604 Tenda CH22 Parameter CertLocalPrecreate formCertLocalPrecreate stack-based overflow
- CVE-2026-5605 Tenda CH22 WrlExtraSet formWrlExtraSet stack-based overflow
- CVE-2026-5204 Tenda CH22 Parameter webtypelibrary formWebTypeLibrary stack-based overflow
Sources
Also known as GHSA-c48j-9c86-pwjg.