CVE-2021-35943

CRITICALNVD 9.89.8—

9.8

Couchbase Server 6.5.x and 6.6.x through 6.6.2 has Incorrect Access Control. Externally managed users are not prevented from using an empty password, per RFC4513.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 66.7%
KEV: Not listed

Published

September 29, 2021

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://docs.couchbase.com/server/current/release-notes/relnotes.html
cve@mitrehttps://www.couchbase.com/alerts
af854a3a-2127-422b-91ae-364da2661108https://docs.couchbase.com/server/current/release-notes/relnotes.html
af854a3a-2127-422b-91ae-364da2661108https://www.couchbase.com/alerts

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× 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.

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Frequently asked(5)

What is CVE-2021-35943?

CVE-2021-35943 is a critical vulnerability published on September 29, 2021. Couchbase Server 6.5.x and 6.6.x through 6.6.2 has Incorrect Access Control. Externally managed users are not prevented from using an empty password, per RFC4513.

When was CVE-2021-35943 disclosed?

CVE-2021-35943 was first published in the National Vulnerability Database on September 29, 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-2021-35943 actively exploited?

CVE-2021-35943 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-35943?

CVE-2021-35943 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-35943?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-35943, 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-2021-35943

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-35943?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)