CVE-2026-25815

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{}

{"analysis": {"en": {"generated_at": "2026-04-17T22:58:51.725780+00:00", "value": {"mitigation_remediation": ["Upgrade FortiOS to the latest patched release that removes the default encryption key reuse issue.", "If an upgrade is not immediately possible, enable the FortiManager\u2011supported private data encryption option to use a unique, non\u2011default key for each device; be aware this may affect some management functionalities as noted in the documentation.", "Restrict filesystem permissions and network access to the FortiGate configuration files, ensuring only authorized administrative accounts or processes can read them."], "summary": {"action": "Patch Immediately", "impact": "Credential Theft"}, "threat_synthesis": {"affected_systems": "All FortiGate devices running FortiOS 7.6.6 or earlier are potentially impacted. The affected product is Fortinet FortiOS, as identified by the vendor/product CPE string. No specific device models are listed, so the risk applies broadly to any FortiGate appliance storing configuration data in the standard format.", "description_and_impact": "The vulnerability exists in Fortinet FortiOS versions up to 7.6.6. It allows an attacker who has access to the device's configuration files to decrypt LDAP credentials, exposing administrators' usernames and passwords. The weakness arises because the default encryption key is identical for all customers. Attackers could then use these credentials to access unauthorized services or compromise the FortiGate device.", "risk_and_exploitability": "The CVSS score of 3.2 indicates a low severity, but the vulnerability has been actively exploited in the wild from December 2025 through 2026. EPSS is less than 1%, suggesting a very low probability of exploitation, yet real-world activity contradicts that low statistical likelihood. Likely attackers already possess read access to the configuration files\u2014through local or remotely misconfigured management interfaces\u2014and then leverage the default key to recover LDAP credentials. The weakness is classified as CWE-1394, a cryptographic issue involving key management. The vulnerability is not listed in the CISA KEV catalog."}}}}, "created": "2026-04-17T23:00:12.656575+00:00", "title": "LDAP Credentials Decryption via Default Encryption Key in FortiOS 7.6.6", "updated": "2026-04-17T23:00:12.656591+00:00", "vendors": []}