CVE-2023-51966Public exploitNetwork attack vector

Unauthenticated memory corruption via IPTV VLAN parameter

Published Jan 10, 2024 · Updated Jun 20, 2025

Stack-based buffer overflow in Tenda AX1803 firmware 1.0.0.1 allows remote attackers to corrupt memory using a crafted IPTV VLAN value. The setIptvInfo function accepts the adv.iptv.stballvlans parameter without enforcing stack-buffer bounds, allowing adjacent memory to be overwritten. No authentication or user interaction is required to reach the network path; resulting process corruption can interrupt router service or alter execution.

CVSS severity9.8
Critical
EPSS probability0.70%
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 Tenda AX1803 firmware 1.0.0.1 allows remote attackers to corrupt memory using a crafted IPTV VLAN value. The setIptvInfo function accepts the adv.iptv.stballvlans parameter without enforcing stack-buffer bounds, allowing adjacent memory to be overwritten. No authentication or user interaction is required to reach the network path; resulting process corruption can interrupt router service or alter execution.

The record

CVE
CVE-2023-51966
Published
Jan 10, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS: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 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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