CVE-2026-19822: Stack-based Buffer Overflow in Tenda W20E
A vulnerability was identified in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC. This issue affects the function lstAdd of the file /goform/editQos of the component QoS Edit. Such manipulation of the argument qosListConnecttedNum leads to stack-based buffer overflow. The attack may be launched remotely. The exploit is publicly available and might be used.
AI Analysis
Technical Summary
The vulnerability CVE-2026-19822 affects the Tenda W20E router firmware version 15.11.0.6(1068_1546_841)_CN_TDC. It is a stack-based buffer overflow in the lstAdd function within the /goform/editQos file of the QoS Edit component. The issue arises from improper handling of the qosListConnecttedNum argument, allowing an attacker to overflow the stack remotely. Exploit code is publicly available, increasing the risk of exploitation. No official patch or remediation guidance is currently documented.
Potential Impact
Successful exploitation of this vulnerability can lead to a stack-based buffer overflow, potentially allowing remote attackers to execute arbitrary code or cause a denial of service on the affected device. The vulnerability requires no user interaction and can be triggered remotely, increasing its severity. The CVSS 4.0 base score is 8.7 (high), reflecting the significant 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, consider restricting remote access to the affected device's management interfaces to trusted networks only and monitor for any unusual activity related to QoS configuration requests.
CVE-2026-19822: Stack-based Buffer Overflow in Tenda W20E
Description
A vulnerability was identified in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC. This issue affects the function lstAdd of the file /goform/editQos of the component QoS Edit. Such manipulation of the argument qosListConnecttedNum leads to stack-based buffer overflow. The attack may be launched remotely. The exploit is publicly available and might be used.
CVSS v4.0
Score 8.7high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-19822 affects the Tenda W20E router firmware version 15.11.0.6(1068_1546_841)_CN_TDC. It is a stack-based buffer overflow in the lstAdd function within the /goform/editQos file of the QoS Edit component. The issue arises from improper handling of the qosListConnecttedNum argument, allowing an attacker to overflow the stack remotely. Exploit code is publicly available, increasing the risk of exploitation. No official patch or remediation guidance is currently documented.
Potential Impact
Successful exploitation of this vulnerability can lead to a stack-based buffer overflow, potentially allowing remote attackers to execute arbitrary code or cause a denial of service on the affected device. The vulnerability requires no user interaction and can be triggered remotely, increasing its severity. The CVSS 4.0 base score is 8.7 (high), reflecting the significant 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, consider restricting remote access to the affected device's management interfaces to trusted networks only and monitor for any unusual activity related to QoS configuration requests.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-14T05:30:15.673Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7f0282bf8831d539fec748
Added to database: 08/14/2026, 11:56:50 UTC
Last enriched: 08/14/2026, 12:26:20 UTC
Last updated: 08/14/2026, 16:40:59 UTC
Views: 4
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