CVE-2025-14656

A weakness has been identified in Tenda AC20 16.03.08.12. This affects the function httpd of the file /goform/openSchedWifi. Executing a manipulation of the argument schedStartTime/schedEndTime can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

CVSS 4.0

7.4CVSS: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

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-120

Published

2025-12-14

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• tenda:ac20_firmware

References

• https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN14/AC20_openSchedWifi.md
• https://vuldb.com/?ctiid.336389
• https://vuldb.com/?id.336389
• https://vuldb.com/?submit.712917
• https://www.tenda.com.cn/

Check your stackJSON