CVE-2021-25459

MEDIUMNVD 4.05.5▲
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 4.0; sources differ by 1.5.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.0Exploit: NoneExposed: 0

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

An improper access control vulnerability in sspInit() in BlockchainTZService prior to SMR Sep-2021 Release 1 allows attackers to start BlockchainTZService.

CVSS v3
4.0
EG Score
5.5(medium)
EPSS
1.9%
KEV
Not listed

Published

September 9, 2021

Last Modified

November 21, 2024

References (2)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 40× 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. 2026-07-22 22:45 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
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  51. 2026-05-31 22:29 UTCEPSS rescore
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  59. 2026-05-26 13:42 UTCEPSS rescore
  60. 2026-05-26 10:37 UTCEG score recompute
  61. 2026-05-26 10:37 UTCGHSA enrichment
  62. 2026-05-26 07:17 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-25459?
CVE-2021-25459 is a medium vulnerability published on September 9, 2021. An improper access control vulnerability in sspInit() in BlockchainTZService prior to SMR Sep-2021 Release 1 allows attackers to start BlockchainTZService.
When was CVE-2021-25459 disclosed?
CVE-2021-25459 was first published in the National Vulnerability Database on September 9, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-25459 actively exploited?
CVE-2021-25459 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-25459?
CVE-2021-25459 has a CVSS v3 base score of 4.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.5.
How do I remediate CVE-2021-25459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-25459, 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.

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