How severe is CVE-2025-64157?

CVE-2025-64157 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-64157 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64157?

CVE-2025-64157 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64157?

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

Does CVE-2025-64157 have an EU (EUVD) identifier?

Yes. CVE-2025-64157 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207129.

When was CVE-2025-64157 published?

CVE-2025-64157 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2025-64157

CVE-2025-64157 is a medium-severity vulnerability in Fortinet Fortios with a CVSS 3.x base score of 6.7. 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-134.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207129
Weakness: CWE-134
Affected product: Fortinet Fortios
Published: 2026-02-10
Last modified: 2026-06-17

Description

A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.

Frequently asked questions

What is CVE-2025-64157?: A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.
How severe is CVE-2025-64157?: CVE-2025-64157 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-64157 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64157?: CVE-2025-64157 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64157?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-64157 have an EU (EUVD) identifier?: Yes. CVE-2025-64157 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207129.
When was CVE-2025-64157 published?: CVE-2025-64157 was published on 2026-02-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

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Other CWE-134 vulnerabilities

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CVE-2011-2475 — Critical (CVSS 10.0): Format string vulnerability in ECTrace.dll in the iMailGateway service in the Internet Mail Gateway in OneBridge Server…
CVE-2011-1568 — Critical (CVSS 10.0): Format string vulnerability in the logText function in shmemmgr9.dll in IGSSdataServer.exe 9.00.00.11074, and…
CVE-2010-4235 — Critical (CVSS 10.0): Format string vulnerability in RealNetworks Helix Server 12.x, 13.x, and 14.x before 14.2, and Helix Mobile Server…
CVE-2011-0270 — Critical (CVSS 10.0): Format string vulnerability in nnmRptConfig.exe in HP OpenView Network Node Manager (OV NNM) 7.51 and 7.53 allows…

Browse all CWE-134 vulnerabilities →