An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.
Only devices with FortiCloud SSO authentication enabled are exposed, in FortiAnalyzer 7.6.0 through 7.6.5 and several other listed Fortinet products. No fixed version is listed in the checked facts.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
This vulnerability affects Fortinet's FortiAnalyzer, FortiManager, FortiNAC-F, FortiOS, FortiProxy, and FortiWeb products. It could allow an attacker with their own FortiCloud account and a registered device to log into other Fortinet devices belonging to different accounts that have FortiCloud single sign-on enabled, bypassing proper authentication.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.
Timeline
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CVE published
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Fortinet FortiWeb
From 8.0.0 · through 8.0.3; From 7.6.0 · through 7.6.6; From 7.4.0 · through 7.4.11
- Fortinet FortiNAC-F
From 7.6.3 · through 7.6.5
- Fortinet FortiOS
From 7.6.0 · through 7.6.5; From 7.4.0 · through 7.4.10; From 7.2.0 · through 7.2.12; From 7.0.0 · through 7.0.18
- Fortinet FortiAnalyzer
From 7.6.0 · through 7.6.5; From 7.4.0 · through 7.4.9; From 7.2.0 · through 7.2.11; From 7.0.0 · through 7.0.15
- Fortinet FortiProxy
From 7.6.0 · through 7.6.4; From 7.4.0 · through 7.4.12; From 7.2.0 · through 7.2.15; From 7.0.0 · through 7.0.22
- Fortinet FortiManager
From 7.6.0 · through 7.6.5; From 7.4.0 · through 7.4.9; From 7.2.0 · through 7.2.11; From 7.0.0 · through 7.0.15
References 1
fortiguard.fortinet.com
Questions about CVE-2026-24858
What does this mean?
An attacker with a FortiCloud account and a registered device can log into other devices registered to other FortiCloud accounts with administrative access. The described impact includes downloading customer config files.Source: fortiguard.fortinet.com
Am I affected, and how do I check?
Listed FortiAnalyzer ranges are 7.6.0 through 7.6.5, 7.4.0 through 7.4.9, 7.2.0 through 7.2.11, and 7.0.0 through 7.0.15, and the issue applies only when FortiCloud SSO authentication is enabled on the device. To check, look at the firmware version on the device and at whether System -> Settings shows Allow administrative login using FortiCloud SSO as On.Source: fortiguard.fortinet.com
What should I do about it?
No fixed version is listed in the checked facts, so no upgrade target can be named. The vendor's workaround note says FortiCloud SSO no longer supports login from devices running vulnerable versions, and that disabling FortiCloud SSO login is not necessary at the moment.Source: fortiguard.fortinet.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-01-27, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
No fixed version is listed. The vendor's option is to set Allow administrative login using FortiCloud SSO to Off in System -> Settings, or to run the CLI command set admin-forticloud-sso-login disable. The vendor says this is not necessary at the moment, so it is an option rather than a required step.Source: fortiguard.fortinet.com