CVE-2023-51842Network attack vector

Information disclosure via legacy MPS TLS negotiation

Published Jan 29, 2024 · Updated Jun 2, 2025

Algorithm downgrade in Ylianst MeshCentral 1.1.16 allows remote attackers to read MPS traffic through legacy TLS negotiation. The lower-security MPS branch in mpsserver.js sets TLSv1 as the minimum and omits the flags that disable TLS 1.0 and TLS 1.1 for older Intel AMT CIRA clients. Public material does not identify the exposed data or explain how legacy negotiation yields disclosure; integrity and availability effects are not reported.

CVSS severity7.5
High
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Algorithm downgrade in Ylianst MeshCentral 1.1.16 allows remote attackers to read MPS traffic through legacy TLS negotiation. The lower-security MPS branch in mpsserver.js sets TLSv1 as the minimum and omits the flags that disable TLS 1.0 and TLS 1.1 for older Intel AMT CIRA clients. Public material does not identify the exposed data or explain how legacy negotiation yields disclosure; integrity and availability effects are not reported.

The record

CVE
CVE-2023-51842
Published
Jan 29, 2024
Updated
Jun 2, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-757, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 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

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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-757Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
T1557Adversary-in-the-Middle

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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