CVE-2019-17656
A Stack-based Buffer Overflow vulnerability in the HTTPD daemon of FortiOS 6.0.10 and below, 6.2.2 and below and FortiProxy 1.0.x, 1.1.x, 1.2.9 and below, 2.0.0 and below may allow an authenticated remote attacker to crash the service by sending a malformed PUT request to the server. Fortinet is not aware of any successful exploitation of this vulnerability that would lead to code execution.
Key facts
- CVSS score
- 5.4 (v3.1)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L- Weakness (CWE)
- CWE-787
- EPSS score
- 1.6% (75th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2019-7962)
- Published
- April 12, 2021
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2019-7962 in the EU Vulnerability Database. Last updated in EUVD on October 25, 2024.
View on the EU Vulnerability DatabaseAffected products
- fortinet / fortios
- fortinet / fortiproxy
Certified products that may be affected
6 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- FortiOS 5.6 - Fortinet, Inc. - FIPS 140 3639 - historical
- FortiProxy-400E/2000E/4000E - Fortinet, Inc. - FIPS 140 3628 - historical
- Fortinet FortiProxy v1.0 - Fortinet, Inc. - Common Criteria 383-4-475 - archived
- FortiOS 5.2 - Fortinet, Inc. - FIPS 140 2765 - historical
- FortiOS™ - Fortinet, Inc. - FIPS 140 1754 - historical
See all 6 in the Security Certifications Explorer.
References
- https://fortiguard.com/advisory/FG-IR-19-248(Vendor Advisory)
- https://fortiguard.com/advisory/FG-IR-21-007(Vendor Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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