CVE-2026-19821: Buffer Overflow in Tenda AC12
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.
AI Analysis
Technical Summary
This vulnerability exists in the Tenda AC12 router firmware version 15.03.06.23_multi_TD01. The flaw is in the formSetRebootTimer function within the /goform/SetSysAutoRebbotCfg component of the HTTP web management interface. By sending a specially crafted rebootTime parameter, an attacker can cause a buffer overflow. This vulnerability is remotely exploitable without user interaction and has been publicly disclosed. No vendor advisory or patch information is currently provided.
Potential Impact
Successful exploitation of this buffer overflow vulnerability could allow an unauthenticated remote attacker to cause a denial of service or potentially execute arbitrary code on the affected device. The CVSS 4.0 base score is 8.7 (high severity), reflecting the ease of remote exploitation and the potential for high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the device's web management interface from untrusted networks to reduce exposure.
CVE-2026-19821: Buffer Overflow in Tenda AC12
Description
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.
CVSS v4.0
Score 8.7high
Affected software
cpe:2.3:h:tenda:ac12:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in the Tenda AC12 router firmware version 15.03.06.23_multi_TD01. The flaw is in the formSetRebootTimer function within the /goform/SetSysAutoRebbotCfg component of the HTTP web management interface. By sending a specially crafted rebootTime parameter, an attacker can cause a buffer overflow. This vulnerability is remotely exploitable without user interaction and has been publicly disclosed. No vendor advisory or patch information is currently provided.
Potential Impact
Successful exploitation of this buffer overflow vulnerability could allow an unauthenticated remote attacker to cause a denial of service or potentially execute arbitrary code on the affected device. The CVSS 4.0 base score is 8.7 (high severity), reflecting the ease of remote exploitation and the potential for high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the device's web management interface from untrusted networks to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-14T05:29:33.667Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7ef803bf8831d539ed42df
Added to database: 08/14/2026, 11:12:03 UTC
Last enriched: 08/14/2026, 11:26:07 UTC
Last updated: 08/14/2026, 13:43:25 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.