High severity · published Mar 26, 2026
CVE-2026-4904
Tenda AC5 POST Request setcfm formSetCfm stack-based overflow
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
A vulnerability has been found in Tenda AC5 15.03.06.47. This issue affects the function formSetCfm of the file /goform/setcfm of the component POST Request Handler. Such manipulation of the argument funcpara1 leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC5 · Tenda
15.03.06.47 · source: vendor
AF
Ac5 Firmware · Tenda
15.03.06.47 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4904
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4904
Exploit
https://lavender-bicycle-a5a.notion.site/Tenda_AC5_setcfm_funcpara1-32053a41781f8073a4d6ef8076abe644?source=copy_link
Permissions Required
https://vuldb.com/?ctiid.353655
Third Party Advisory
https://vuldb.com/?id.353655
Third Party Advisory
https://vuldb.com/?submit.777381
Product
https://www.tenda.com.cn/
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