Code execution via undisclosed open redirect
Published Sep 8, 2026 · Updated Sep 10, 2026
Open redirect in FortiSIEM 7.4.1 through 7.4.2 and 7.5.0 through 7.5.1 allows attackers to execute unauthorized code or commands. Fortinet has not published the affected URL, parameter, or redirect-validation error, and the CNA record retains a placeholder instead of an attack vector. Exploitation is network-based, needs no privileges, and requires user interaction; the reported impact is limited to unauthorized modification.
Summary
What happened
Open redirect in FortiSIEM 7.4.1 through 7.4.2 and 7.5.0 through 7.5.1 allows attackers to execute unauthorized code or commands. Fortinet has not published the affected URL, parameter, or redirect-validation error, and the CNA record retains a placeholder instead of an attack vector. Exploitation is network-based, needs no privileges, and requires user interaction; the reported impact is limited to unauthorized modification.
The record
- CVE
- CVE-2026-84389
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Fortinet
- Product
- FortiSIEM
- Classifications
- CWE-601
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7.4.1 <=7.4.2
- Affected versionversion=7.5.0 <=7.5.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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