CVE-2024-41586

Authenticated code execution via overlong CGI query

Published Oct 3, 2024 · Updated Oct 3, 2024

Stack-based buffer overflow in DrayTek Vigor3910 firmware through 4.3.2.6 allows remote authenticated users to execute arbitrary code. The /cgi-bin/ipfedr.cgi Web UI handler processes an overlong query string without enforcing the stack buffer's bounds. Reachability requires low-privileged access from an adjacent network; successful exploitation can fully compromise the appliance.

CVSS severity8.0
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in DrayTek Vigor3910 firmware through 4.3.2.6 allows remote authenticated users to execute arbitrary code. The /cgi-bin/ipfedr.cgi Web UI handler processes an overlong query string without enforcing the stack buffer's bounds. Reachability requires low-privileged access from an adjacent network; successful exploitation can fully compromise the appliance.

The record

CVE
CVE-2024-41586
Published
Oct 3, 2024
Updated
Oct 3, 2024
Vendor
DrayTek
Product
Vigor3910
Classifications
CWE-121, T1190
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 2024Record 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 <=4.3.2.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

DrayTek · Vigor3910version=0 <=4.3.2.6

Published CVSS scores

8.0CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-121Stack-based 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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