CVE-2026-19823: Tenda W20E QoS Rule Deletion delQos formQOSRuleDel stack-based overflow

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-14 · updated 2026-08-18
Weakness: CWE-119

Description

A security flaw has been discovered in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC. Impacted is the function formQOSRuleDel of the file /goform/delQos of the component QoS Rule Deletion. Performing a manipulation of the argument qosIndex results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.

Affected products

Tenda W20E: 15.11.0.6(1068_1546_841)_CN_TDC

References

https://github.com/paueger/mycve/blob/main/Tenda_W20E/4.md
https://vuldb.com/cve/CVE-2026-19823
https://vuldb.com/submit/869021
https://vuldb.com/vuln/389956
https://vuldb.com/vuln/389956/cti
https://www.tenda.com.cn/

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