Is CVE-2022-45856 in the CISA KEV catalog?

No. CVE-2022-45856 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-45856?

CVE-2022-45856 has a CVSS v3 base score of 4.8 (MEDIUM).

What is the EPSS score for CVE-2022-45856?

CVE-2022-45856 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-45856?

Upgrade FortiClient VPN to 7.2.1 or later.

CVE & CISA-KEV Catalog

CVE-2022-45856

MEDIUM

4.8

CVSS v3

NVD

Description

An improper certificate validation vulnerability [CWE-295] in FortiClientWindows 6.4 all versions, 7.0.0 through 7.0.7, FortiClientMac 6.4 all versions, 7.0 all versions, 7.2.0 through 7.2.4, FortiClientLinux 6.4 all versions, 7.0 all versions, 7.2.0 through 7.2.4, FortiClientAndroid 6.4 all versions, 7.0 all versions, 7.2.0 and FortiClientiOS 5.6 all versions, 6.0.0 through 6.0.1, 7.0.0 through 7.0.6 SAML SSO feature may allow an unauthenticated attacker to man-in-the-middle the communication between the FortiClient and both the service provider and the identity provider.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

FortiClient VPNWindows application

Affected:5.0 7.2.1Fixed in:7.2.1

Affected:2.0 7.0.7Fixed in:7.0.7

Affected:6.4 7.2.5Fixed in:7.2.5

Affected:6.4 7.0.8Fixed in:7.0.8

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

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Vendor Advisory1

fortiguard.fortinet.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 2024-09-26.