CVE-2019-17656

MEDIUM
6.5
CVSS Score
Published: April 12, 2021 at 02:14 PM UTC
Updated: June 17, 2026 at 02:24 AM UTC
2 products affected across 1 vendorFortiOSFortiProxy

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.2.9v ≤ 6.0.106.2.0 ≤ v ≤ 6.2.2
v ≤ 1.2.91.0.0 ≤ v < 1.2.102.0.0 ≤ v < 2.0.2
Affected range stops below 1.2.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMVendor Advisory
https://fortiguard.com/advisory/FG-IR-19-248
x_refsource_CONFIRMVendor Advisory
https://fortiguard.com/advisory/FG-IR-21-007

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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