CVE-2026-24858An 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…
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It affects Fortinet FortiWeb and 8 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 27, 2026; federal agencies had to remediate by Jan 30, 2026. Treat that date as your deadline.
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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.
- CVSS
- 9.4 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
- Weakness (CWE)
- CWE-288
- Known exploited
- Added to CISA KEV Jan 27, 2026; federal remediation due Jan 30, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 85.80% (percentile 100)
- Assigned by
- fortinet
- NVD analysis
- Analyzed
- Record last updated
- Jun 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Fortinet FortiWeb 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 | CNA record |
Fortinet FortiNAC-F fortinet:fortinac_f (from the name) | from 7.6.3 through 7.6.5 | CNA record |
Fortinet FortiOS 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 | CNA record |
Fortinet FortiAnalyzer 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 | CNA record |
Fortinet FortiProxy 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 | CNA record |
Fortinet FortiManager 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 | CNA record |
Siemens RUGGEDCOM APE1808 siemens:ruggedcom_ape1808 (from the name) | all versions | CISA ADP |
fortinet fortianalyzer fortinet:fortianalyzer | from 7.0.0 through 7.0.15; from 7.2.0 through 7.2.11; from 7.4.0 before 7.4.10; from 7.6.0 before 7.6.6 | NVD |
fortinet fortimanager fortinet:fortimanager | from 7.0.0 through 7.0.15; from 7.2.0 through 7.2.11; from 7.4.0 before 7.4.10; from 7.6.0 before 7.6.6 | NVD |
fortinet fortinac-f fortinet:fortinac-f | from 7.6.3 before 7.6.6 | NVD |
fortinet fortiproxy fortinet:fortiproxy | from 7.0.0 through 7.0.22; from 7.2.0 through 7.2.15; from 7.4.0 through 7.4.12; from 7.6.0 through 7.6.4 | NVD |
fortinet fortiweb fortinet:fortiweb | from 7.4.0 through 7.4.11; from 7.6.0 through 7.6.6; from 8.0.0 through 8.0.3 | NVD |
fortinet fortios fortinet:fortios | from 7.0.0 through 7.0.18; from 7.2.0 through 7.2.12; from 7.4.0 before 7.4.11; from 7.6.0 before 7.6.6 | NVD |
siemens ruggedcom_ape1808_firmware siemens:ruggedcom_ape1808_firmware | all versions | NVD |
References
- https://fortiguard.fortinet.com/psirt/FG-IR-26-060vendor-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-975644.htmlthird-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858us-government-resource
- https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortiosmitigation, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.