Buffer overflow in Tenda W20e
CVE-2026-19822
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.003
Affected products
- Tenda W20e — versions 15.11.0.6(1068_1546_841)_CN_TDC
Weakness classification (CWE)
References
- vuldb.com/vuln/389955 (technical-description, vdb-entry)
- vuldb.com/vuln/389955/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19822 (third-party-advisory)
- vuldb.com/submit/869006 (third-party-advisory)
- github.com/paueger/mycve/blob/main/Tenda_W20E/3.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-19822?
- CVE-2026-19822 is a high-severity vulnerability in Tenda W20e, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-08-14.
- How severe is CVE-2026-19822?
- High severity. CVSS v3 base score is 8.8 out of 10.