CVE-2026-21444

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 100% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

libtpms, a library that provides software emulation of a Trusted Platform Module, has a flaw in versions 0.10.0 and 0.10.1. The commonly used integration of libtpms with OpenSSL 3.x contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps. The highest threat from this vulnerability is to data confidentiality. Version 0.10.2 fixes the issue. No known workarounds are available.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
0.0%
KEV
Not listed

Published

January 2, 2026

Last Modified

February 25, 2026

References (3)

Vendor Advisories for CVE-2026-21444(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 12× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 11:49 UTCOSV refresh
  2. 2026-07-23 03:06 UTCEG score recompute
  3. 2026-07-18 10:04 UTCEPSS rescore
  4. 2026-07-18 10:04 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-08 15:15 UTCEPSS rescore
  7. 2026-07-08 15:15 UTCEPSS rescore
  8. 2026-07-06 07:02 UTCOSV refresh
  9. 2026-07-01 15:06 UTCEPSS rescore
  10. 2026-07-01 15:06 UTCEPSS rescore
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-18 17:52 UTCEPSS rescore
  14. 2026-06-17 18:13 UTCOSV refresh
  15. 2026-06-17 17:53 UTCEPSS rescore
  16. 2026-06-15 17:48 UTCEPSS rescore
  17. 2026-06-14 23:18 UTCEPSS rescore
  18. 2026-06-13 23:00 UTCEPSS rescore
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-12 23:12 UTCEPSS rescore
  21. 2026-06-11 14:00 UTCEPSS rescore
  22. 2026-06-10 22:18 UTCEPSS rescore
  23. 2026-06-10 13:22 UTCEPSS rescore
  24. 2026-06-08 14:17 UTCEPSS rescore
  25. 2026-06-08 14:17 UTCEPSS rescore
Show 24 more
  1. 2026-06-07 15:25 UTCEPSS rescore
  2. 2026-06-07 15:24 UTCEPSS rescore
  3. 2026-06-06 13:47 UTCEPSS rescore
  4. 2026-06-06 13:47 UTCEPSS rescore
  5. 2026-06-06 13:47 UTCEPSS rescore
  6. 2026-06-05 22:47 UTCEPSS rescore
  7. 2026-06-05 06:10 UTCEPSS rescore
  8. 2026-06-05 06:10 UTCEPSS rescore
  9. 2026-06-04 13:12 UTCEPSS rescore
  10. 2026-06-04 13:12 UTCEPSS rescore
  11. 2026-06-04 13:12 UTCEPSS rescore
  12. 2026-06-02 20:13 UTCEPSS rescore
  13. 2026-06-02 20:13 UTCEPSS rescore
  14. 2026-06-01 13:51 UTCEPSS rescore
  15. 2026-06-01 13:51 UTCEPSS rescore
  16. 2026-06-01 13:51 UTCEPSS rescore
  17. 2026-05-31 22:30 UTCEPSS rescore
  18. 2026-05-31 22:30 UTCEPSS rescore
  19. 2026-05-31 00:16 UTCEPSS rescore
  20. 2026-05-31 00:16 UTCEPSS rescore
  21. 2026-05-31 00:16 UTCEPSS rescore
  22. 2026-05-29 16:44 UTCEG score recompute
  23. 2026-05-29 13:44 UTCEPSS rescore
  24. 2026-05-29 13:44 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-21444?
CVE-2026-21444 is a medium vulnerability published on January 2, 2026. libtpms, a library that provides software emulation of a Trusted Platform Module, has a flaw in versions 0.10.0 and 0.10.1. The commonly used integration of libtpms with OpenSSL 3.x contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were…
When was CVE-2026-21444 disclosed?
CVE-2026-21444 was first published in the National Vulnerability Database on January 2, 2026, with the most recent update on February 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21444 actively exploited?
CVE-2026-21444 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-21444?
CVE-2026-21444 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-21444?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21444, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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