CVE-2023-26204

Name: CVE-2023-26204
Creator: NVD / NIST
Published: 2023-06-13T09:15:16.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2023-26204 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A plaintext storage of a password vulnerability [CWE-256] in FortiSIEM 6.7 all versions, 6.6 all versions, 6.5 all versions, 6.4 all versions, 6.3 all versions, 6.2 all versions, 6.1 all versions, 5.4 all versions, 5.3 all versions may allow an attacker able to access user DB content to impersonate any admin user on the device GUI.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

A plaintext storage of a password vulnerability [CWE-256] in FortiSIEM 6.7 all versions, 6.6 all versions, 6.5 all versions, 6.4 all versions, 6.3 all versions, 6.2 all versions, 6.1 all versions, 5.4 all versions, 5.3 all versions may allow an attacker able to access user DB content to impersonate any admin user on the device GUI.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.43%

34.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fortinet	Fortisiem	>= 5.3.0, <= 5.3.3
Fortinet	Fortisiem	>= 6.3.0, <= 6.3.3
Fortinet	Fortisiem	>= 6.6.0, <= 6.6.3
Fortinet	Fortisiem	>= 6.7.0, <= 6.7.5
Fortinet	Fortisiem	5.4.0
Fortinet	Fortisiem	6.1.0
Fortinet	Fortisiem	6.1.1
Fortinet	Fortisiem	6.1.2
Fortinet	Fortisiem	6.2.0
Fortinet	Fortisiem	6.2.1
Fortinet	Fortisiem	6.4.0
Fortinet	Fortisiem	6.4.1
Fortinet	Fortisiem	6.4.2
Fortinet	Fortisiem	6.5.0
Fortinet	Fortisiem	6.5.1

References

https://fortiguard.com/psirt/FG-IR-21-141Vendor Advisory
https://fortiguard.com/psirt/FG-IR-21-141Vendor Advisory

Timeline

Published: Jun 13, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-26204?

How severe is CVE-2023-26204?

CVE-2023-26204 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26204?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26204?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST