CVE-2026-5204 Tenda CH22 Parameter webtypelibrary formWebTypeLibrary stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda CH22 router's web type library handler, 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-2026-5204?
CVE-2026-5204 is a high-severity memory corruption vulnerability in Tenda CH22, published on 31 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in Tenda CH22 1.0.0.1. Affected is the function formWebTypeLibrary of the file /goform/webtypelibrary of the component Parameter Handler. This manipulation of the argument webSiteId causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-5204?
It affects 1 product.
Products include Tenda Ch22 Firmware.
How do I fix CVE-2026-5204?
No fix has been published for CVE-2026-5204 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-2026-5204 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5204 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-2026-5152 Tenda CH22 createFileName formCreateFileName stack-based overflow
Sources
Also known as GHSA-5qj8-jcmc-3p6q.