Is CVE-2015-5965 being actively exploited?

CVE-2015-5965 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2015-5965?

CVE-2015-5965 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2015-5965

MEDIUM · CVSS 5.0EPSS 2.1%EU EUVD

The SSL-VPN feature in Fortinet FortiOS before 4.3.13 only checks the first byte of the TLS MAC in finished messages, which makes it easier for remote attackers to spoof encrypted content via a crafted MAC field.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness (CWE): CWE-20
EPSS score: 2.1% (81th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2015-5908)
Published: August 11, 2015
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2015-5908 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

fortinet / fortios

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

FortiOS™ - Fortinet, Inc. - FIPS 140 1754 - historical
FortiOS - Fortinet, Inc. - FIPS 140 1431 - historical

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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