CVE-2025-13446

Tenda AC21 SetSysTimeCfg stack-based overflow

Published Nov 20, 2025 CVSS 4.0 · 8.7 High EPSS 4.2% KEV · Not listed
Description
A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Tenda ac21 Firmware
CPEs cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*
Vendors & Products Tenda ac21 Firmware
Type Values Removed Values Added
First Time appeared Tenda
Tenda ac21
Vendors & Products Tenda
Tenda ac21
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
Title Tenda AC21 SetSysTimeCfg stack-based overflow
Weaknesses CWE-119
CWE-121
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 8.8, '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'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
Feb 24, 2026, 6:36 AM
Reserved
Nov 19, 2025, 7:14 PM
Status
Analyzed
Published
Nov 20, 2025, 3:17 PM
Modified
Oct 18, 2026, 8:10 PM