Tenda W20E QoS Rule Deletion delQos formQOSRuleDel stack-based overflow
Published Aug 14, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
Tenda W20E QoS Rule Deletion delQos formQOSRuleDel stack-based overflow
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- VDB-389956 | Tenda W20E QoS Rule Deletion delQos formQOSRuleDel stack-based overflow ↗
- VDB-389956 | CTI Indicators (IOB, IOC, IOA) ↗
- CVE-2026-19823 | CVE Analysis and Report ↗
- Submit #869021 | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow ↗
- Source repository ↗
- www.tenda.com.cn ↗
Record history
Published Aug 14, 2026 · Last refreshed Nov 3, 2026