Description
A security flaw has been discovered in Tenda AC20 16.03.08.12. The impacted element is the function formSetRebootTimer of the file /goform/SetSysAutoRebbotCfg of the component httpd. Performing a manipulation of the argument rebootTime results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.
Affected products
tenda: ac20 firmware; tenda: ac20
References5
- github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN13/AC20_Set… ExploitThird Party Advisory
- vuldb.com/?ctiid.336388 Permissions RequiredVDB Entry
- vuldb.com/?id.336388 Third Party AdvisoryVDB Entry
- vuldb.com/?submit.712910 Third Party AdvisoryVDB Entry
- www.tenda.com.cn/ Product
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/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
- 3% percentile: 89 · as of 11 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.