CVE-2021-33589

HIGHNVD 7.57.5—

7.5

Ribose RNP before 0.15.1 does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than on the tin of the algorithm.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 35.8%
KEV: Not listed

Published

April 21, 2023

Last Modified

February 4, 2025

References (4)

cve@mitrehttps://open.ribose.com/advisories/ra-2021-05-30/#CVE-2021-33589
cve@mitrehttps://www.ribose.com/feedback/security
af854a3a-2127-422b-91ae-364da2661108https://open.ribose.com/advisories/ra-2021-05-30/#CVE-2021-33589
af854a3a-2127-422b-91ae-364da2661108https://www.ribose.com/feedback/security

Weakness Classification(1)

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

CWE-522Insufficiently Protected Credentials

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-33589?

CVE-2021-33589 is a high vulnerability published on April 21, 2023. Ribose RNP before 0.15.1 does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than on the tin of the algorithm.

When was CVE-2021-33589 disclosed?

CVE-2021-33589 was first published in the National Vulnerability Database on April 21, 2023, with the most recent update on February 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-33589 actively exploited?

CVE-2021-33589 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-33589?

CVE-2021-33589 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-33589?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33589, 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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CVE-2021-33589

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-33589?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)