CVE-2026-19823Tenda W20E QoS Rule Deletion delQos formQOSRuleDel stack-based overflow
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
- Weakness (CWE)
- CWE-121, CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Aug 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Tenda W20E tenda:w20e_firmware | 15.11.0.6(1068_1546_841)_CN_TDC | CNA record |
References
- https://vuldb.com/vuln/389956vdb-entry, technical-description
- https://vuldb.com/vuln/389956/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-19823third-party-advisory
- https://vuldb.com/submit/869021third-party-advisory
- https://github.com/paueger/mycve/blob/main/Tenda_W20E/4.mdexploit
- https://www.tenda.com.cn/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.