How severe is CVE-2025-59921?

CVE-2025-59921 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-59921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59921?

CVE-2025-59921 primarily affects Fortinet Fortiadc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-59921?

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

Does CVE-2025-59921 have an EU (EUVD) identifier?

Yes. CVE-2025-59921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34234.

When was CVE-2025-59921 published?

CVE-2025-59921 was published on 2025-10-14 and last updated on 2026-06-17.

CVE-2025-59921

CVE-2025-59921 is a medium-severity vulnerability in Fortinet Fortiadc with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34234
Weakness: CWE-200
Affected product: Fortinet Fortiadc
Published: 2025-10-14
Last modified: 2026-06-17

Description

An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in Fortinet FortiADC version 7.4.0, version 7.2.3 and below, version 7.1.4 and below, 7.0 all versions, 6.2 all versions may allow an authenticated attacker to obtain sensitive data via crafted HTTP or HTTPs requests.

Frequently asked questions

What is CVE-2025-59921?: An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in Fortinet FortiADC version 7.4.0, version 7.2.3 and below, version 7.1.4 and below, 7.0 all versions, 6.2 all versions may allow an authenticated attacker to obtain sensitive data via crafted HTTP or HTTPs requests.
How severe is CVE-2025-59921?: CVE-2025-59921 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-59921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59921?: CVE-2025-59921 primarily affects Fortinet Fortiadc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-59921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-59921 have an EU (EUVD) identifier?: Yes. CVE-2025-59921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34234.
When was CVE-2025-59921 published?: CVE-2025-59921 was published on 2025-10-14 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-23-434

Affected products (2)

cpe:2.3:a:fortinet:fortiadc:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiadc:7.4.0:*:*:*:*:*:*:*

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