CVE-2024-46566Network attack vector

Unauthenticated service interruption via unchecked sAppName copy

Published Sep 18, 2024 · Updated Mar 18, 2025

Stack buffer overflow in sslapp.cgi in DrayTek Vigor3910 4.3.2.6 allows remote attackers to interrupt service via crafted sAppName input. The CGI handler performs an unchecked copy of the sAppName parameter into a stack buffer, allowing oversized input to corrupt adjacent memory. No authentication or user interaction is required; public evidence limits the demonstrated consequence to service interruption and does not identify a hang, crash, or reboot.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in sslapp.cgi in DrayTek Vigor3910 4.3.2.6 allows remote attackers to interrupt service via crafted sAppName input. The CGI handler performs an unchecked copy of the sAppName parameter into a stack buffer, allowing oversized input to corrupt adjacent memory. No authentication or user interaction is required; public evidence limits the demonstrated consequence to service interruption and does not identify a hang, crash, or reboot.

The record

CVE
CVE-2024-46566
Published
Sep 18, 2024
Updated
Mar 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

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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