CVE-2026-24858

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Summary

CVECVE-2026-24858
StatePUBLISHED
Assignerfortinet
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-27 20:16:24 UTC
Updated2026-05-12 18:47:28 UTC
DescriptionAn 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, 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.062070000 probability, percentile 0.909570000 (date 2026-05-12)

CISA KEV: Listed on 2026-01-27; due 2026-01-30; ransomware use Unknown

Problem Types: CWE-288 | CWE-288 Improper access control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.4CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

VendorFortinet
ProductMultiple Products
NameFortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
Required ActionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
NotesPlease adhere to Fortinet's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 ; https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios ; https://nvd.nist.gov/vuln/detail/CVE-2026-24858

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Fortinet Fortianalyzer All All All All
Application Fortinet Fortianalyzer All All All All
Application Fortinet Fortianalyzer All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fortinet FortiOS affected 7.6.0 7.6.5 semver Not specified
CNA Fortinet FortiOS affected 7.4.0 7.4.10 semver Not specified
CNA Fortinet FortiOS affected 7.2.0 7.2.12 semver Not specified
CNA Fortinet FortiOS affected 7.0.0 7.0.18 semver Not specified
CNA Fortinet FortiManager affected 7.6.0 7.6.5 semver Not specified
CNA Fortinet FortiManager affected 7.4.0 7.4.9 semver Not specified
CNA Fortinet FortiManager affected 7.2.0 7.2.11 semver Not specified
CNA Fortinet FortiManager affected 7.0.0 7.0.15 semver Not specified
CNA Fortinet FortiAnalyzer affected 7.6.0 7.6.5 semver Not specified
CNA Fortinet FortiAnalyzer affected 7.4.0 7.4.9 semver Not specified
CNA Fortinet FortiAnalyzer affected 7.2.0 7.2.11 semver Not specified
CNA Fortinet FortiAnalyzer affected 7.0.0 7.0.15 semver Not specified
CNA Fortinet FortiProxy affected 7.6.0 7.6.4 semver Not specified
CNA Fortinet FortiProxy affected 7.4.0 7.4.12 semver Not specified
CNA Fortinet FortiProxy affected 7.2.0 7.2.15 semver Not specified
CNA Fortinet FortiProxy affected 7.0.0 7.0.22 semver Not specified
CNA Fortinet FortiWeb affected 8.0.0 8.0.3 semver Not specified
CNA Fortinet FortiWeb affected 7.6.0 7.6.6 semver Not specified
CNA Fortinet FortiWeb affected 7.4.0 7.4.11 semver Not specified
ADP Siemens RUGGEDCOM APE1808 affected * custom Not specified

References

ReferenceSourceLinkTags
fortiguard.fortinet.com/psirt/FG-IR-26-060 [email protected] fortiguard.fortinet.com Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
cert-portal.siemens.com/productcert/html/ssa-975644.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com Third Party Advisory
www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.fortinet.com Mitigation, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Additional Advisory Data

Solutions

CNA: Upgrade to upcoming FortiOS version 8.0.0 or above Upgrade to FortiOS version 7.6.6 or above Upgrade to FortiOS version 7.4.11 or above Upgrade to FortiOS version 7.2.13 or above Upgrade to FortiOS version 7.0.19 or above Upgrade to upcoming FortiManager version 8.0.0 or above Upgrade to FortiManager version 7.6.6 or above Upgrade to FortiManager version 7.4.10 or above Upgrade to FortiManager version 7.2.12 or above Upgrade to FortiManager version 7.0.16 or above Upgrade to FortiAnalyzer version 7.6.6 or above Upgrade to FortiAnalyzer version 7.4.10 or above Upgrade to FortiAnalyzer version 7.2.12 or above Upgrade to FortiAnalyzer version 7.0.16 or above Upgrade to FortiProxy version 7.6.5 or above Upgrade to FortiProxy version 7.4.13 or above Upgrade to FortiProxy version 7.2.16 or above Upgrade to FortiProxy version 7.0.23 or above Upgrade to FortiWeb version 8.0.4 or above Upgrade to FortiWeb version 7.6.7 or above Upgrade to FortiWeb version 7.4.12 or above Upgrade to FortiNAC-F version 7.6.6 or above Upgrade to FortiSwitchManager version 7.2.9 or above Upgrade to FortiSwitchManager version 7.0.8 or above

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