Tenda W20E QoS Edit editQos lstAdd stack-based overflow (CVE-2026-19822) | HOL Guard CVE

High · CVSS 8.8CVE-2026-19822

Tenda W20E QoS Edit editQos lstAdd stack-based overflow

Answer in brief

CVE-2026-19822 records a High severity (CVSS 8.8) vulnerability in Tenda W20E QoS Edit editQos lstAdd stack-based overflow. The current sources do not mark it as known exploited. The current feed maps Tenda/W20E (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 14, 2026Updated Aug 14, 2026Source checked Sep 29, 2026First seen by HOL Aug 14, 2026Material review Aug 14, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Tenda/W20E (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Tenda/W20Egeneric	15.11.0.6(1068_1546_841)_CN_TDC	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Tenda/W20E.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 14, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.