Vulnerability record · CVE-2026-19821 · published 14 August 2026

CVE-2026-19821: Memory buffer overflow vulnerability

A vulnerability was determined in Tenda AC12 15.03.06.23_multi_TD01. This vulnerability affects the function formSetRebootTimer of the file /goform/SetSysAutoRebbotCfg of the component httpd web management interface. This manipulation of the argument rebootTime causes buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.

7.4 CVSS 4.0 High EPSS 0.85% · top 43.4% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow Deferred

7.4CVSS 4.0 base score, v2 9.0

0.85%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

6References

18 Aug 2026Last modified by NVD

Description

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:

References

Link	Tags
https://github.com/lipenghai/iot_bug/blob/main/Tenda/AC12/4.md
https://vuldb.com/cve/CVE-2026-19821
https://vuldb.com/submit/868922
https://vuldb.com/vuln/389954
https://vuldb.com/vuln/389954/cti
https://www.tenda.com.cn/

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Source: NIST National Vulnerability Database (record CVE-2026-19821), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.