CVE-2026-24858
Fortinet · published 2026-01-27
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2026-01-27).
- CISA's name for it: Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
- CISA's description: Fortinet FortiAnalyzer, FortiManager, FortiOS, and FortiProxy contain an authentication bypass using an alternate path or channel that could 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.
- Known ransomware campaign use, per CISA: Unknown
Source: CISA KEV catalog (CC0 1.0).
Description
Description by Fortinet, Inc. via the CVE Program.
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.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiWeb | 8.0.0 – 8.0.3 and earlier: affected 7.6.0 – 7.6.6 and earlier: affected 7.4.0 – 7.4.11 and earlier: affected |
| Fortinet | FortiNAC-F | 7.6.3 – 7.6.5 and earlier: affected |
| Fortinet | FortiOS | 7.6.0 – 7.6.5 and earlier: affected 7.4.0 – 7.4.10 and earlier: affected 7.2.0 – 7.2.12 and earlier: affected 7.0.0 – 7.0.18 and earlier: affected |
| Fortinet | FortiAnalyzer | 7.6.0 – 7.6.5 and earlier: affected 7.4.0 – 7.4.9 and earlier: affected 7.2.0 – 7.2.11 and earlier: affected 7.0.0 – 7.0.15 and earlier: affected |
| Fortinet | FortiProxy | 7.6.0 – 7.6.4 and earlier: affected 7.4.0 – 7.4.12 and earlier: affected 7.2.0 – 7.2.15 and earlier: affected 7.0.0 – 7.0.22 and earlier: affected |
| Fortinet | FortiManager | 7.6.0 – 7.6.5 and earlier: affected 7.4.0 – 7.4.9 and earlier: affected 7.2.0 – 7.2.11 and earlier: affected 7.0.0 – 7.0.15 and earlier: affected |
Added by siemens-SADP (Authorized Data Publisher)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | RUGGEDCOM APE1808 | 0 – before *: affected |
Products named in NVD's CPE match criteria (7)
cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortinac-f:*:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 9.8 CRITICAL — as published by Fortinet, Inc. (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: yes · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://fortiguard.fortinet.com/psirt/FG-IR-26-060
- https://cert-portal.siemens.com/productcert/html/ssa-975644.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858
- https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios
Source dates: published 2026-01-27, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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