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Fencer Intel
high 7.2

CVE-2026-71911 json

DrayTek VigorAP Multiple Models Buffer Overflow via setLan

published 2mo ago modified 29d ago also EUVD-2026-64970

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

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.

Patch / fix

  • DrayTek Corporation VigorAP 918R 1.4.11
  • DrayTek Corporation VigorAP 960C 1.4.12
  • DrayTek Corporation VigorAP 1060C 1.4.12
  • DrayTek Corporation VigorAP 906 1.4.13
  • DrayTek Corporation VigorAP 912C 1.4.15
  • DrayTek Corporation VigorAP 903 1.4.22

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 8.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 8.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • DrayTek Corporation VigorAP 918R
  • DrayTek Corporation VigorAP 960C
  • DrayTek Corporation VigorAP 1060C
  • DrayTek Corporation VigorAP 906
  • DrayTek Corporation VigorAP 912C
  • DrayTek Corporation VigorAP 903

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.