CVE-2023-51743Network attack vector

Authenticated service interruption via UCID out-of-bounds write

Published Jan 17, 2024 · Updated Jun 17, 2025

Out-of-bounds write in Skyworth Digital CM5100 4.1.1.24 allows remote authenticated users to interrupt service via crafted UCID input. The Set Upstream Channel ID handler fails to validate the supplied parameter before an out-of-bounds memory write. Access to the management interface is required, and the published record does not identify whether interruption occurs by hang, crash, or reboot.

CVSS severity7.5
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Skyworth Digital CM5100 4.1.1.24 allows remote authenticated users to interrupt service via crafted UCID input. The Set Upstream Channel ID handler fails to validate the supplied parameter before an out-of-bounds memory write. Access to the management interface is required, and the published record does not identify whether interruption occurs by hang, crash, or reboot.

The record

CVE
CVE-2023-51743
Published
Jan 17, 2024
Updated
Jun 17, 2025
Vendor
Skyworth Digital
Product
CM5100
Classifications
CWE-787, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.1.1.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Skyworth Digital · CM5100version=0 <=4.1.1.24

Published CVSS scores

6.5Indian Computer Emergency Response Team (CERT-In)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499Endpoint Denial of Service

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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