Critical severity · published Mar 16, 2026
CVE-2026-4252
Tenda AC8 IPv6 check_is_ipv6 ip address for authentication
9.8
CVSS
1.3%
EPSS
No
On KEV
Description
A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC8 · Tenda
16.03.50.11 · source: vendor
AF
Ac8 Firmware · Tenda
16.03.50.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4252
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4252
Exploit
https://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_ipv6_auth_bypass.py
Permissions Required
https://vuldb.com/?ctiid.351210
Third Party Advisory
https://vuldb.com/?id.351210
Exploit
https://vuldb.com/?submit.771759
Product
https://www.tenda.com.cn/
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