CVE-2023-2538

TLS Private Key Accessible to External Parties

MEDIUM
4.2
CVSS Score
Published: July 5, 2023 at 12:11 PM UTC
Updated: June 17, 2026 at 05:52 AM UTC
9 products affected across 1 vendorS5552 /s5552wgm4nr Ex FirmwareS5552 /s5552gm4nr FirmwareS5552 /s5552gm2nr Firmware

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Severity
MEDIUM4.2
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A CWE-552 "Files or Directories Accessible to External Parties” in the web interface of the Tyan S5552 BMC version 3.00 allows an unauthenticated remote attacker to retrieve the private key of the TLS certificate in use by the BMC via forced browsing. This can then be abused to perform Man-in-the-Middle (MitM) attacks against victims that access the web interface through HTTPS.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

tyan-s5552-s5552gm2nr (same device)
tyan-s5552-s5552gm4nr (same device)
tyan-s5552-s5552wgm4nr-ex (same device)
tyan-s5552-s5552wgm4nr (same device)
All versions
All versions
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-552

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