Fortinet Multiple Products Format String Vulnerability
A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, FortiPAM versions…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)09 Oct 2024
- Exploited in EUVD (ENISA)09 Oct 2024
- Used by ransomwareno
- EPSS above 10 %61.7%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, FortiPAM versions 1.2.0, 1.1.0 through 1.1.2, 1.0.0 through 1.0.3, FortiSwitchManager versions 7.2.0 through 7.2.3, 7.0.0 through 7.0.3 allows attacker to execute unauthorized code or commands via specially crafted packets.
Affected products
- 1.0.0 ≤1.0.3
- 7.4.0 ≤7.4.2
- 7.0.0 ≤7.0.15
- 7.0.0 ≤7.0.13
- 7.2.0 ≤7.2.3
- 1.1.0 ≤1.1.2
- 1.2.0
- 7.0.0 ≤7.0.3
- 7.2.0 ≤7.2.6
- 7.2.0 ≤7.2.8
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 61.7%
References
Other exploited vulnerabilities from the same vendor
- CVE-2025-61624Fortinet Multiple Products Path Traversal Vulnerability3.4 · Rising fast
- CVE-2026-104286Fortinet FortiMail Path Traversal Vulnerability5.9 · Actively exploited
- CVE-2025-25249Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability4.9 · Actively exploited
- CVE-2025-68686Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability5.4 · Actively exploited
- CVE-2026-39808Fortinet FortiSandbox OS Command Injection Vulnerability8.8 · Actively exploited
- CVE-2026-25089Fortinet FortiSandbox OS Command Injection Vulnerability8.3 · Actively exploited