CVE-2026-71911Network attack vector

Authenticated code execution via unchecked setLan copies

Published Aug 24, 2026 · Updated Aug 24, 2026

Buffer overflow in DrayTek VigorAP firmware allows remote authenticated users to crash access points or execute arbitrary commands. The setLan function copies the lanVlanId0, lanIp, and lanNetmask fields without checking their lengths, allowing crafted values to overrun a buffer. DrayTek confirms the affected code but reports no demonstrated practical attack path; access would require valid web-administration credentials.

CVSS severity7.2
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in DrayTek VigorAP firmware allows remote authenticated users to crash access points or execute arbitrary commands. The setLan function copies the lanVlanId0, lanIp, and lanNetmask fields without checking their lengths, allowing crafted values to overrun a buffer. DrayTek confirms the affected code but reports no demonstrated practical attack path; access would require valid web-administration credentials.

The record

CVE
CVE-2026-71911
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
DrayTek
Product
VigorAP 960C
Classifications
CWE-120, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.4.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

DrayTek · VigorAP 960Cversion=0 <1.4.12
DrayTek · VigorAP 906version=0 <1.4.13
DrayTek · VigorAP 903version=0 <1.4.22
DrayTek · VigorAP 918Rversion=0 <1.4.11
DrayTek · VigorAP 912Cversion=0 <1.4.15
DrayTek · VigorAP 1060Cversion=0 <1.4.12

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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