How severe is CVE-2013-4669?

CVE-2013-4669 has a CVSS 2.0 base score of 5.4, rated medium severity.

Is CVE-2013-4669 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4669?

CVE-2013-4669 primarily affects Fortinet Forticlient. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4669?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4669 published?

CVE-2013-4669 was published on 2013-06-25 and last updated on 2026-06-16.

CVE-2013-4669

CVE-2013-4669 is a medium-severity vulnerability in Fortinet Forticlient with a CVSS 2.0 base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-255.

Key facts

Severity: Medium (CVSS 2.0 base score 5.4)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Fortinet Forticlient
Published: 2013-06-25
Last modified: 2026-06-16

Description

FortiClient before 4.3.5.472 on Windows, before 4.0.3.134 on Mac OS X, and before 4.0 on Android; FortiClient Lite before 4.3.4.461 on Windows; FortiClient Lite 2.0 through 2.0.0223 on Android; and FortiClient SSL VPN before 4.0.2258 on Linux proceed with an SSL session after determining that the server's X.509 certificate is invalid, which allows man-in-the-middle attackers to obtain sensitive information by leveraging a password transmission that occurs before the user warning about the certificate problem.

Frequently asked questions

What is CVE-2013-4669?: FortiClient before 4.3.5.472 on Windows, before 4.0.3.134 on Mac OS X, and before 4.0 on Android; FortiClient Lite before 4.3.4.461 on Windows; FortiClient Lite 2.0 through 2.0.0223 on Android; and FortiClient SSL VPN before 4.0.2258 on Linux proceed with an SSL session after determining that the server's X.509 certificate is invalid, which allows man-in-the-middle attackers to obtain sensitive information by leveraging a password transmission that occurs before the user warning about the certificate problem.
How severe is CVE-2013-4669?: CVE-2013-4669 has a CVSS 2.0 base score of 5.4, rated medium severity.
Is CVE-2013-4669 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4669?: CVE-2013-4669 primarily affects Fortinet Forticlient. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4669?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4669 published?: CVE-2013-4669 was published on 2013-06-25 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlient_lite:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlient_ssl_vpn:*:*:*:*:*:*:*:*

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