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TI-2026-50206 Aliases CVE-2026-71911GHSA-79vq-rxp3-f6f5

DrayTek VigorAP Multiple Models Buffer Overflow via setLan

Priority MEDIUM 40CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00683 52nd percentileScored 2026-11-07
Fix Fixed VigorAP 918R (DrayTek Corporation): 1.4.11VigorAP 960C (DrayTek Corporation): 1.4.12+4 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DrayTekVigorAP 918Rbefore 1.4.111.4.11Patch availableCNA
DrayTekVigorAP 960Cbefore 1.4.121.4.12Patch availableCNA
DrayTekVigorAP 1060Cbefore 1.4.121.4.12Patch availableCNA
DrayTekVigorAP 906before 1.4.131.4.13Patch availableCNA
DrayTekVigorAP 912Cbefore 1.4.151.4.15Patch availableCNA
DrayTekVigorAP 903before 1.4.221.4.22Patch availableCNA
  • VigorAP 918R VendorDrayTek Affected before 1.4.11 Fixed in 1.4.11 Patch available CNA
  • VigorAP 960C VendorDrayTek Affected before 1.4.12 Fixed in 1.4.12 Patch available CNA
  • VigorAP 1060C VendorDrayTek Affected before 1.4.12 Fixed in 1.4.12 Patch available CNA
  • VigorAP 906 VendorDrayTek Affected before 1.4.13 Fixed in 1.4.13 Patch available CNA
  • VigorAP 912C VendorDrayTek Affected before 1.4.15 Fixed in 1.4.15 Patch available CNA
  • VigorAP 903 VendorDrayTek Affected before 1.4.22 Fixed in 1.4.22 Patch available CNA

Remediation

  • Fix · CNA VigorAP 918R (DrayTek Corporation) Fixed in 1.4.11
  • Fix · CNA VigorAP 960C (DrayTek Corporation) Fixed in 1.4.12
  • Fix · CNA VigorAP 1060C (DrayTek Corporation) Fixed in 1.4.12
  • Fix · CNA VigorAP 906 (DrayTek Corporation) Fixed in 1.4.13
  • Fix · CNA VigorAP 912C (DrayTek Corporation) Fixed in 1.4.15
  • Fix · CNA VigorAP 903 (DrayTek Corporation) Fixed in 1.4.22

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    DrayTek VigorAP 1060C, VigorAP 903 and 4 more products — draytek.com/about/security-advisory/multiple-remote-code-ex…

    11 records Highest priority Priority MEDIUM 11 MEDIUM

    Other records, highest priority first

    • TI-2026-50209 DrayTek VigorAP Multiple Models Pre-Authentication OS Command Injection via dray_apmPriority MEDIUM 53
    • TI-2026-50205 DrayTek VigorAP Multiple Models OS Command Injection via apautotestPriority MEDIUM 44
    • TI-2026-50204 DrayTek VigorAP Multiple Models OS Command Injection via InquierTimePriority MEDIUM 44
    Show all 11 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71911
  2. 2026-10-03 Alias added: GHSA-79vq-rxp3-f6f5

References

Advisory 1

  • TI-2020-12150 On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-06834 DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta… KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-12038 DrayTek Vigor2960/Vigor300B Web Management Interface apmcfgupload os command injection KEVCVSS 4.0MEDIUM 6.9
  • TI-2021-03424 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
  • TI-2021-03423 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
  • TI-2024-34310 In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into… CVSS 3.1CRITICAL 9.8
See all 184 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences