How severe is CVE-2023-26204?

CVE-2023-26204 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-26204 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-26204?

CVE-2023-26204 primarily affects Fortinet Fortisiem. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-26204?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-26204 published?

CVE-2023-26204 was published on 2023-06-13 and last updated on 2026-06-17.

CVE-2023-26204

CVE-2023-26204 is a low-severity vulnerability in Fortinet Fortisiem with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Fortinet Fortisiem
Published: 2023-06-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-26204?: 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.
How severe is CVE-2023-26204?: CVE-2023-26204 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-26204 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-26204?: CVE-2023-26204 primarily affects Fortinet Fortisiem. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-26204?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-26204 published?: CVE-2023-26204 was published on 2023-06-13 and last updated on 2026-06-17.

References

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

Affected products (12)

cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:5.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.1.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.2.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.2.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.4.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.5.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.5.1:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortisiem

CVE-2024-23109 — Critical (CVSS 10.0): An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet…
CVE-2024-23108 — Critical (CVSS 10.0): An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet…
CVE-2023-34992 — Critical (CVSS 10.0): A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet…
CVE-2023-40714 — Critical (CVSS 9.9): A relative path traversal in Fortinet FortiSIEM versions 7.0.0, 6.7.0 through 6.7.2, 6.6.0 through 6.6.3, 6.5.1, 6.5.0…
CVE-2025-64155 — Critical (CVSS 9.8): An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet…
CVE-2025-25256 — Critical (CVSS 9.8): An improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] in…

All CVEs affecting Fortinet Fortisiem →

Other CWE-522 (Insufficiently Protected Credentials) vulnerabilities

CVE-2026-7312 — Critical (CVSS 10.0): CWE‑522: Insufficiently Protected Credentials in web services in Progress Sitefinity version from 14.0.7700 to…
CVE-2026-29128 — Critical (CVSS 10.0): IDC SFX2100 Satellite Receiver firmware ships with multiple daemon configuration files for routing components (e.g.,…
CVE-2025-54863 — Critical (CVSS 10.0): Radiometrics VizAir is vulnerable to exposure of the system's REST API key through a publicly accessible configuration…
CVE-2024-12799 — Critical (CVSS 10.0): Insufficiently Protected Credentials vulnerability in OpenText Identity Manager Advanced Edition on Windows, Linux, 64…
CVE-2024-51545 — Critical (CVSS 10.0): Username Enumeration vulnerabilities allow access to application level username add, delete, modify and list…
CVE-2023-1778 — Critical (CVSS 10.0): This vulnerability exists in GajShield Data Security Firewall firmware versions prior to v4.28 (except v4.21) due to…

Browse all CWE-522 (Insufficiently Protected Credentials) vulnerabilities →