How severe is CVE-2025-15321?

CVE-2025-15321 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-15321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15321?

CVE-2025-15321 affects Tanium Tanos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-15321?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-15321 have an EU (EUVD) identifier?

Yes. CVE-2025-15321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206840.

When was CVE-2025-15321 published?

CVE-2025-15321 was published on 2026-02-05 and last updated on 2026-06-17.

CVE-2025-15321

CVE-2025-15321 is a low-severity vulnerability in Tanium Tanos with a CVSS 3.x base score of 2.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206840
Weakness: CWE-863
Affected product: Tanium Tanos
Published: 2026-02-05
Last modified: 2026-06-17

Description

Tanium addressed an improper input validation vulnerability in Tanium Appliance.

Frequently asked questions

What is CVE-2025-15321?: Tanium addressed an improper input validation vulnerability in Tanium Appliance.
How severe is CVE-2025-15321?: CVE-2025-15321 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-15321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15321?: CVE-2025-15321 affects Tanium Tanos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-15321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-15321 have an EU (EUVD) identifier?: Yes. CVE-2025-15321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206840.
When was CVE-2025-15321 published?: CVE-2025-15321 was published on 2026-02-05 and last updated on 2026-06-17.

References

https://security.tanium.com/TAN-2025-024

Affected products (1)

cpe:2.3:o:tanium:tanos:*:*:*:*:*:*:*:*

More vulnerabilities in Tanium Tanos

CVE-2025-15311 — High (CVSS 7.8): Tanium addressed an unauthorized code execution vulnerability in Tanium Appliance.
CVE-2025-15312 — Medium (CVSS 6.6): Tanium addressed an improper output sanitization vulnerability in Tanium Appliance.
CVE-2025-13225 — Medium (CVSS 5.6): Tanium addressed an arbitrary file deletion vulnerability in TanOS.
CVE-2026-2605 — Medium (CVSS 5.3): Tanium addressed an insertion of sensitive information into log file vulnerability in TanOS.
CVE-2025-15323 — Low (CVSS 3.7): Tanium addressed an improper certificate validation vulnerability in Tanium Appliance.

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