CVE-2026-21444

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 0.2% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-01-02 19:05Z8 MO AGO

Last updated

2026-01-05 20:37Z8 MO AGO

Reserved

2025-12-29

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weaknesses

• CWE-327Use of a Broken or Risky Cryptographic AlgorithmClass
• CWE-330Use of Insufficiently Random ValuesClass
• CWE-1204Generation of Weak Initialization Vector (IV)Base

Data version

5.2

Document digest

01c365a946ff4bce6a8cb9478cce6b77c791b48fc82490fde04ce43135a3e13b

• github.comhttps://github.com/stefanberger/libtpms/security/advisories/GHSA-7jxr-4j3g-p34fx_refsource_CONFIRM
• github.comhttps://github.com/stefanberger/libtpms/issues/541x_refsource_MISC
• github.comhttps://github.com/stefanberger/libtpms/commit/33c9ff074cb16c1841ce7d7f33643c17c426743ax_refsource_MISC