CVE-2023-34942Public exploitNetwork attack vector

Service crash via overlong MAC parameter

Published Jun 12, 2023 · Updated Aug 2, 2024

Stack overflow in ASUS RT-N10LX Router 2.0.0.39 allows remote attackers to crash the HTTP service via a crafted mac parameter. The formFilter handler accepts an overlong POST mac value despite its 12-character check and passes it to macFilterList, where a 104-byte stack buffer is overrun. No authentication or user interaction is required; successful exploitation terminates httpd and requires a router reboot to restore service.

CVSS severity7.5
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in ASUS RT-N10LX Router 2.0.0.39 allows remote attackers to crash the HTTP service via a crafted mac parameter. The formFilter handler accepts an overlong POST mac value despite its 12-character check and passes it to macFilterList, where a 104-byte stack buffer is overrun. No authentication or user interaction is required; successful exploitation terminates httpd and requires a router reboot to restore service.

The record

CVE
CVE-2023-34942
Published
Jun 12, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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

7.5NIST National Vulnerability DatabaseCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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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