CVE-2023-51093Public exploitNetwork attack vector

Remote code execution via oversized VLAN parameter

Published Dec 26, 2023 · Updated Aug 2, 2024

Stack overflow in Tenda M3 firmware 1.0.0.12(4856) allows remote attackers to execute code or crash the device via a crafted HTTP request. The /goform/setVlanInfo handler exposes fromSetLocalVlanInfo, where an oversized vlan parameter overwrites the httpd process stack. The published proof of concept supplies an admin-valued cookie, but NVD assesses no required privileges or user interaction; exploitation yields a shell or terminates the service.

CVSS severity9.8
Critical
EPSS probability0.84%
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 Tenda M3 firmware 1.0.0.12(4856) allows remote attackers to execute code or crash the device via a crafted HTTP request. The /goform/setVlanInfo handler exposes fromSetLocalVlanInfo, where an oversized vlan parameter overwrites the httpd process stack. The published proof of concept supplies an admin-valued cookie, but NVD assesses no required privileges or user interaction; exploitation yields a shell or terminates the service.

The record

CVE
CVE-2023-51093
Published
Dec 26, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 26, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

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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