CVE-2026-84389: url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM 7.5.0 through 7.5.1, FortiSIEM 7.4.1 through 7.4.2 may allow attacker to execute unauthorized code or commands via
CVE-2026-84389 key facts
- CISA KEV
- Not listed (catalogue checked )
- Highest advisory rating
- Low
- CVSS base score
- 3.1 (Fortinet), 3.1 (Fortinet)
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C· base score 2.8, scored by fortinetAttack vector: network. Attack complexity: high. Privileges required: none. User interaction: required. Scope: unchanged. Confidentiality impact: none. Integrity impact: low. Availability impact: none.- Weakness
- CWE-601 Execute unauthorized code or commands
- EPSS
- 0.22% chance of exploitation in the next 30 days (12th percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: no. Technical impact: total. CISA, .
- Vendor advisories
- 2 from Fortinet
- Assigned by
- fortinet (CNA)
- CVE record published
- Listed by VulniPulse
Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-84389; each belongs to its advisory, not to every product listed. How records are collected and checked.
Description
A url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM 7.5.0 through 7.5.1, FortiSIEM 7.4.1 through 7.4.2 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
Text from the CVE.org record (fortinet).
How do I fix CVE-2026-84389?
- Upgrade to upcoming FortiSIEM version 7.6.0 or above Upgrade to upcoming FortiSIEM version 7.5.2 or above (CVE.org record)
Vendor advisories for CVE-2026-84389
Fortinet
2 advisories- Advisory severityLow3.1
Low [CVE-2026-84389] url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM 7.5.0 through 7.5.1, FortiSIEM 7.4.1 through 7.4.2 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
CVE-2026-84389Source published Source updated
A url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM 7.5.0 through 7.5.1, FortiSIEM 7.4.1 through 7.4.2 may allow attacker to execute unauthorized code or commands
- Affected products in this advisory
- FortiSIEM
- Source-reported affected versions
- FortiSIEM FortiSIEM: 6.5 through 7.6 (vendor-listed versions)
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
- Advisory severityLow3.1
Low [CVE-2026-84389] Open Redirect on FortiSIEM
FG-IR-26-169Source published Source updated
CVSSv3 Score: 3.1 An URL redirection to untrusted site ('open redirect') [CWE-601] vulnerability in FortiSIEM may allow an authenticated attacker to cause a redirection to any website via specially crafted HTTP requests Revised on 2026-09-08 00:00:00
- Affected products in this advisory
- FortiSIEM
- Source-reported affected versions
- FortiSIEM FortiSIEM: 6.5 through 7.6 (vendor-listed versions)
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
References
Timeline
- CVE record published
- First vendor advisory listed by VulniPulse
- CVE record last updated
More Fortinet advisories
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