High severity · published Mar 31, 2026
CVE-2026-5204
Tenda CH22 Parameter webtypelibrary formWebTypeLibrary stack-based overflow
8.8
CVSS
2.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.5% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
CH22 · Tenda
1.0.0.1 · source: vendor
CF
Ch22 Firmware · Tenda
1.0.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5204
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5204
Exploit
https://github.com/Litengzheng/vuldb_new/blob/main/CH22/vul_49/README.md
Third Party Advisory
https://vuldb.com/submit/780209
Third Party Advisory
https://vuldb.com/vuln/354332
Permissions Required
https://vuldb.com/vuln/354332/cti
Product
https://www.tenda.com.cn/
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