High severity · published Nov 27, 2018
CVE-2018-13376
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…
7.5
CVSS
2.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiOS · Fortinet
through 5.2.12; 5.4.6 through 5.4.7; 5.6.1 through 5.6.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-13376
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-13376
Third Party Advisory
http://www.securityfocus.com/bid/106036
Vendor Advisory
https://fortiguard.com/advisory/FG-IR-18-325
Exploit
https://herolab.usd.de/wp-content/uploads/sites/4/2018/12/usd20180031.txt
More from FortiOS
9.8
CVE-2026-24858
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
9.8
CVE-2025-25249
Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
9.8
CVE-2025-59718
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
9.8
CVE-2024-55591
Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
9.8
CVE-2024-23113
Fortinet Multiple Products Format String Vulnerability