Quick answers
- Is CVE-2026-121530 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121530 being exploited in the wild.
- How severe is CVE-2026-121530?
- Medium severity, with a CVSS score of 6.6, published 10 November 2026.
- Which products and versions are affected?
- Fortinet FortiOS 7.6.0 through 7.6.6.
- Is there a fix for CVE-2026-121530?
- Yes: fixed in FortiOS 7.6.7 or above. Until then: Remove or delete Remote RADIUS Type administrator accounts from the FortiOS system via System > Administrators in the GUI, or use CLI commands to delete the affected Remote type administrator accounts. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-121530 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-121530?
- Check whether you run Fortinet FortiOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: FortiOS 7.6.7 or above
Remove or delete Remote RADIUS Type administrator accounts from the FortiOS system via System > Administrators in the GUI, or use CLI commands to delete the affected Remote type administrator accounts.
Technical details
An improper authentication vulnerability (CWE-287) in the Remote RADIUS Type Admin two-factor authentication mechanism allows an authenticated attacker with read-only permissions to bypass TFA by submitting an invalid token when the RADIUS server returns an "Access-Challenge" response. The attacker must have valid credentials and network access to the GUI. A successful exploit grants full administrative control over the FortiOS appliance.
Affected products
- Fortinet FortiOS 7.6.0 through 7.6.6
Timeline
- 2026-11-10: disclosed