CVE-2024-51138Network attack vector

Elevated code execution via STUN URL parsing overflow

Published Feb 27, 2025 · Updated Jul 5, 2026

Stack-based buffer overflow in DrayTek Vigor router firmware allows remote attackers to execute arbitrary code via a crafted TR-069 STUN request. The TR-069 STUN URL parser fails to bound the number of URL parameters before copying parser data into a stack buffer. An unauthenticated network request can corrupt the stack and run attacker-controlled code with elevated privileges, exposing the router to complete compromise.

CVSS severity9.8
Critical
EPSS probability1.05%
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 Vigor router firmware allows remote attackers to execute arbitrary code via a crafted TR-069 STUN request. The TR-069 STUN URL parser fails to bound the number of URL parameters before copying parser data into a stack buffer. An unauthenticated network request can corrupt the stack and run attacker-controlled code with elevated privileges, exposing the router to complete compromise.

The record

CVE
CVE-2024-51138
Published
Feb 27, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
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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