CVE-2025-13400 Tenda CH22 WrlExtraGet formWrlExtraGet buffer overflow
A buffer overflow in the Tenda CH22 router allows remote attackers to execute arbitrary code or cause a denial of service via the chkHz argument.
- 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-2025-13400?
CVE-2025-13400 is a high-severity memory corruption vulnerability in Tenda CH22, published on 19 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in Tenda CH22 1.0.0.1. Affected is the function formWrlExtraGet of the file /goform/WrlExtraGet. Performing a manipulation of the argument chkHz results in buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used.
Which versions are affected by CVE-2025-13400?
It affects 1 product.
Products include Tenda Ch22 Firmware.
How do I fix CVE-2025-13400?
No fix has been published for CVE-2025-13400 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-2025-13400 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13400 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-mw27-fg8f-7899.