Description
A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be exploited.
Affected products
tenda: ac20 firmware; tenda: ac20
References8
- github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md ExploitThird Party Advisory
- github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#p… ExploitThird Party Advisory
- github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md ExploitThird Party Advisory
- github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#p… ExploitThird Party Advisory
- vuldb.com/?ctiid.322106 Permissions RequiredVDB Entry
- vuldb.com/?id.322106 Third Party AdvisoryVDB Entry
- vuldb.com/?submit.641088 Third Party AdvisoryVDB Entry
- www.tenda.com.cn/ Product
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
7.4
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 60 · as of 8 November 2026
- CWE
- CWE-119CWE-121CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.