CVE-2025-15323Network attack vector

Log disclosure and tampering via unvalidated TLS certificates

Published Feb 5, 2026 · Updated Feb 5, 2026

Improper certificate validation in Tanium Appliance allows remote attackers to view or tamper with logs through TLS remote syslog. The remote-syslog TLS client does not properly validate the destination certificate, but Tanium has not disclosed the failed validation step. Exploitation requires an unauthenticated attacker to control the network path while TLS remote syslog is configured, enabling log viewing or tampering.

CVSS severity3.7
Low
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Tanium Appliance allows remote attackers to view or tamper with logs through TLS remote syslog. The remote-syslog TLS client does not properly validate the destination certificate, but Tanium has not disclosed the failed validation step. Exploitation requires an unauthenticated attacker to control the network path while TLS remote syslog is configured, enabling log viewing or tampering.

The record

CVE
CVE-2025-15323
Published
Feb 5, 2026
Updated
Feb 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 2026Record 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

3.7TaniumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
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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