Vulnerability in Fortinet Fortianalyzer
CVE-2026-24858
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.858 (99.7th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.861 · newest: 0.858 · change: -0.003
Affected products
- Fortinet Fortianalyzer — versions 7.6.0, 7.4.0, 7.2.0
- Fortinet Fortimanager — versions 7.6.0, 7.4.0, 7.2.0
- Fortinet Fortinac-F — versions 7.6.3
- Fortinet Fortios — versions 7.6.0, 7.4.0, 7.2.0
- Fortinet Fortiproxy — versions 7.6.0, 7.4.0, 7.2.0
- Fortinet Fortiweb — versions 8.0.0, 7.6.0, 7.4.0
- Siemens Ruggedcom Ape1808
- Siemens Ruggedcom Ape1808 Firmware
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- fortiguard.fortinet.com/psirt/FG-IR-26-060 (Vendor Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e (Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-24858?
- CVE-2026-24858 is a critical-severity vulnerability in Fortinet Fortianalyzer, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2026-01-27.
- How severe is CVE-2026-24858?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-24858 known to be exploited?
- Yes. CVE-2026-24858 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-01-27), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.