DrayTek VigorAP Multiple Models Buffer Overflow via setLan (CVE-2026-71911) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-71911

DrayTek VigorAP Multiple Models Buffer Overflow via setLan

Answer in brief

CVE-2026-71911 records a Unknown severity vulnerability in DrayTek VigorAP Multiple Models Buffer Overflow via setLan. The current sources do not mark it as known exploited. The current feed maps DrayTek Corporation/VigorAP 1060C (generic), DrayTek Corporation/VigorAP 903 (generic), DrayTek Corporation/VigorAP 906 (generic), DrayTek Corporation/VigorAP 912C (generic) and additional mapped packages. 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 24, 2026Updated Aug 24, 2026Source checked Aug 24, 2026First seen by HOL Aug 24, 2026Material review Aug 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 6 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 DrayTek Corporation/VigorAP 1060C (generic), DrayTek Corporation/VigorAP 903 (generic), DrayTek Corporation/VigorAP 906 (generic), DrayTek Corporation/VigorAP 912C (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
DrayTek Corporation/VigorAP 1060Cgeneric	>=0 <1.4.12	1.4.12
DrayTek Corporation/VigorAP 903generic	>=0 <1.4.22	1.4.22
DrayTek Corporation/VigorAP 906generic	>=0 <1.4.13	1.4.13
DrayTek Corporation/VigorAP 912Cgeneric	>=0 <1.4.15	1.4.15
DrayTek Corporation/VigorAP 918Rgeneric	>=0 <1.4.11	1.4.11
DrayTek Corporation/VigorAP 960Cgeneric	>=0 <1.4.12	1.4.12

Recommended response

Check inventory. Check lockfiles and deployed manifests for DrayTek Corporation/VigorAP 1060C, DrayTek Corporation/VigorAP 903, DrayTek Corporation/VigorAP 906.
Review the reported fix. Update DrayTek Corporation/VigorAP 1060C to 1.4.12; DrayTek Corporation/VigorAP 903 to 1.4.22; DrayTek Corporation/VigorAP 906 to 1.4.13; DrayTek Corporation/VigorAP 912C to 1.4.15; DrayTek Corporation/VigorAP 918R to 1.4.11; DrayTek Corporation/VigorAP 960C to 1.4.12 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 24, 2026

Sources and claim methodology

Upstream source description

Multiple DrayTek VigorAP models contain a buffer overflow vulnerability in the setLan function. The vulnerability is caused by missing length checks during memory copy operations involving the lanVlanId0, lanIp, and lanNetmask fields. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.

Quoted source text, attributed separately from HOL analysis.