CVE-2026-19821: Buffer Overflow in Tenda AC12
A buffer overflow vulnerability exists in the Tenda AC12 router firmware version 15.03.06.23_multi_TD01. The flaw is in the formSetRebootTimer function of the /goform/SetSysAutoRebbotCfg component in the HTTP web management interface. This vulnerability can be exploited remotely by manipulating the rebootTime argument. The vulnerability has a high severity score of 8.8 and has been publicly disclosed, though no known exploits are currently reported in the wild.
AI Analysis
Technical Summary
The Tenda AC12 router firmware version 15.03.06.23_multi_TD01 contains a buffer overflow vulnerability (CWE-119) in the formSetRebootTimer function within the /goform/SetSysAutoRebbotCfg endpoint of the HTTP web management interface. An attacker can remotely trigger this vulnerability by sending a specially crafted rebootTime parameter, potentially leading to arbitrary code execution or denial of service. The vulnerability has been publicly disclosed and is tracked as CVE-2026-19821 with a CVSS v3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Potential Impact
Successful exploitation of this vulnerability could allow a remote attacker with low privileges to cause a buffer overflow, resulting in high impact including full confidentiality, integrity, and availability compromise of the affected device. This could lead to arbitrary code execution or device disruption via the web management interface.
Mitigation Recommendations
No official patch or remediation information is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the device's web management interface to trusted networks and users to reduce exposure.
CVE-2026-19821: Buffer Overflow in Tenda AC12
Description
A buffer overflow vulnerability exists in the Tenda AC12 router firmware version 15.03.06.23_multi_TD01. The flaw is in the formSetRebootTimer function of the /goform/SetSysAutoRebbotCfg component in the HTTP web management interface. This vulnerability can be exploited remotely by manipulating the rebootTime argument. The vulnerability has a high severity score of 8.8 and has been publicly disclosed, though no known exploits are currently reported in the wild.
CVSS v4.0
Score 8.7high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Tenda AC12 router firmware version 15.03.06.23_multi_TD01 contains a buffer overflow vulnerability (CWE-119) in the formSetRebootTimer function within the /goform/SetSysAutoRebbotCfg endpoint of the HTTP web management interface. An attacker can remotely trigger this vulnerability by sending a specially crafted rebootTime parameter, potentially leading to arbitrary code execution or denial of service. The vulnerability has been publicly disclosed and is tracked as CVE-2026-19821 with a CVSS v3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Potential Impact
Successful exploitation of this vulnerability could allow a remote attacker with low privileges to cause a buffer overflow, resulting in high impact including full confidentiality, integrity, and availability compromise of the affected device. This could lead to arbitrary code execution or device disruption via the web management interface.
Mitigation Recommendations
No official patch or remediation information is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the device's web management interface to trusted networks and users to reduce exposure.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-ch7j-xq25-cfm2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-19821"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7f4402bf8831d5395f4568
Added to database: 08/14/2026, 16:36:18 UTC
Last enriched: 08/14/2026, 16:56:57 UTC
Last updated: 08/15/2026, 02:41:00 UTC
Views: 2
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