Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.1, FortiOS 7.4.0 through 7.4.6, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all…
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)27 Jul 2026
- Exploited in EUVD (ENISA)27 Jul 2026
- Used by ransomwareno
- EPSS above 10 %29.5%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
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
An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.1, FortiOS 7.4.0 through 7.4.6, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions may allow a remote unauthenticated attacker to bypass the patch developed for the symbolic link persistency mechanism observed in some post-exploit cases, via crafted HTTP requests. An attacker would need first to have compromised the product via another vulnerability, at filesystem level.
Affected products
- 7.6.0 ≤7.6.1
- 7.0.0 ≤7.0.19
- 7.2.0 ≤7.2.13
- 7.4.0 ≤7.4.6
- 6.4.0 ≤6.4.16
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
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EPSS peak: 29.6%
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-2026-39808Fortinet FortiSandbox OS Command Injection Vulnerability8.8 · Actively exploited
- CVE-2026-25089Fortinet FortiSandbox OS Command Injection Vulnerability8.3 · Actively exploited
- CVE-2026-21643Fortinet FortiClient EMS SQL Injection Vulnerability9.0 · Background exploitation