Is CVE-2021-23167 in the CISA KEV catalog?

No. CVE-2021-23167 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23167?

CVE-2021-23167 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2021-23167?

CVE-2021-23167 has an EPSS score of 0.39% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23167?

Upgrade command centre to 8.50.2048 or later.

CVE & CISA-KEV Catalog

CVE-2021-23167

HIGH

8.1

CVSS v3

NVD

Description

Improper certificate validation vulnerability in SMTP Client allows man-in-the-middle attack to retrieve sensitive information from the Command Centre Server. This issue affects: Gallagher Command Centre 8.50 versions prior to 8.50.2048 (MR3); 8.40 versions prior to 8.40.2063 (MR4); 8.30 versions prior to 8.30.1454 (MR4) ; version 8.20 and prior versions.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

command centreNVD

Affected:>= 8.50, < 8.50.2048Fixed in:8.50.2048CVE-2021-23167derived from NVD

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.39%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Vendor Advisory1

security.gallagher.com

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	83%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

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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 2024-11-21.