Vulnerability · Published Jan 26, 2026 · Assigned by VulDB
CVE-2026-1420Tenda AC23 WifiExtraSet buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in AC23 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.8% (higher than 90% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)3.8%top 9.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A flaw has been found in Tenda AC23 16.03.07.52. This impacts an unknown function of the file /goform/WifiExtraSet. This manipulation of the argument wpapsk_crypto causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-342836 | Tenda AC23 WifiExtraSet buffer overflow vdb-entry, technical-description
- VDB-342836 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #736559 | Tenda AC23 V16.03.07.52 Buffer Overflow third-party-advisory
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow_WifiExtraSet/Tenda%20AC23_Buffer_Overflow_WifiExtraSet.md broken-link, exploit
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow_WifiExtraSet/Tenda%20AC23_Buffer_Overflow_WifiExtraSet.md#poc exploit
- https://www.tenda.com.cn/ product