Vulnerability · Published Aug 14, 2026 · Assigned by VulDB
CVE-2026-19822Tenda W20E QoS Edit editQos lstAdd stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in W20E from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 41.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: 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
References
- VDB-389955 | Tenda W20E QoS Edit editQos lstAdd stack-based overflow vdb-entry, technical-description
- VDB-389955 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-19822 | CVE Analysis and Report third-party-advisory
- Submit #869006 | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow third-party-advisory
- https://github.com/paueger/mycve/blob/main/Tenda_W20E/3.md exploit
- https://www.tenda.com.cn/ product