Is CVE-2020-7921 in the CISA KEV catalog?

No. CVE-2020-7921 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-7921?

CVE-2020-7921 has a CVSS v3 base score of 4.6 (MEDIUM).

What is the EPSS score for CVE-2020-7921?

CVE-2020-7921 has an EPSS score of 0.66% (47th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-7921?

Upgrade MongoDB to 3.6.18 or later.

CVE & CISA-KEV Catalog

CVE-2020-7921

MEDIUM

4.6

CVSS v3

NVD

Description

Improper serialization of internal state in the authorization subsystem in MongoDB Server's authorization subsystem permits a user with valid credentials to bypass IP whitelisting protection mechanisms following administrative action. This issue affects MongoDB Server v4.2 versions prior to 4.2.3; MongoDB Server v4.0 versions prior to 4.0.15; MongoDB Server v4.3 versions prior to 4.3.3and MongoDB Server v3.6 versions prior to 3.6.18.

CWE-182 CWE-863Incorrect Authorization

How to fix

Remediation Available

MongoDBWindows application

Affected:3.6.0 3.6.18Fixed in:3.6.18MongoDB Inc.

Affected:4.0.0 4.0.15Fixed in:4.0.15MongoDB Inc.

Affected:4.2.0 4.2.3Fixed in:4.2.3MongoDB Inc.

Affected:4.3.0 4.3.3Fixed in:4.3.3MongoDB Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.66%probability of exploitation in 30 days

47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Patch1

jira.mongodb.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-23.