Is CVE-2018-13376 being actively exploited?

CVE-2018-13376 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-13376?

CVE-2018-13376 has a CVSS 3.0 base score of 7.5 (HIGH).

CVE-2018-13376

HIGH · CVSS 7.5EPSS 2.1%EU EUVD

An uninitialized memory buffer leak exists in Fortinet FortiOS 5.6.1 to 5.6.3, 5.4.6 to 5.4.7, 5.2 all versions under web proxy's disclaimer response web pages, potentially causing sensitive data to be displayed in the HTTP response.

Key facts

CVSS score: 7.5 (v3.0)
Severity: HIGH
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS score: 2.1% (81th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-5320)
Published: November 27, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-5320 in the EU Vulnerability Database. Last updated in EUVD on October 25, 2024.

View on the EU Vulnerability Database

Affected products

fortinet / fortios

Certified products that may be affected

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

FortiOS 5.6 - Fortinet, Inc. - FIPS 140 3639 - historical
FortiOS 5.2 - Fortinet, Inc. - FIPS 140 2765 - historical
FortiOS™ - Fortinet, Inc. - FIPS 140 1754 - historical
FortiOS - Fortinet, Inc. - FIPS 140 1431 - historical

References

http://www.securityfocus.com/bid/106036(Third Party Advisory, VDB Entry)
https://fortiguard.com/advisory/FG-IR-18-325(Vendor Advisory)
https://herolab.usd.de/wp-content/uploads/sites/4/2018/12/usd20180031.txt(Exploit, Third Party Advisory)

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

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