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CVE-2023-26204

30
FAUCET Score

CVE-2023-26204 is a critical plaintext password storage vulnerability (CWE-256) affecting all versions of FortiSIEM 5.3 through 6.7. An attacker with access to the user database content can impersonate any administrative user on the device's graphical user interface. This vulnerability carries a CVSS score of 9.8 (CRITICAL) due to its network attack vector, low complexity, and high impact on confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.3.0, <= 5.3.3CPE matchmatch criteria
cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
>= 6.3.0, <= 6.3.3CPE matchmatch criteria
cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
>= 6.6.0, <= 6.6.3CPE matchmatch criteria
cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
>= 6.7.0, <= 6.7.5CPE matchmatch criteria
cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
5.4.0CPE matchmatch criteria
cpe:2.3:a:fortinet:fortisiem:5.4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 12th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

fortinetvendor investigatingvia nvd_reference
View patch

References

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