CVE-2026-24858

Exp

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: 2026-01-27 Last update: 2026-06-09 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-24858 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 55.12%, 99th percentile). CISA KEV confirms active exploitation (added 2026-01-27) affecting Fortinet / Multiple Products. a weakness (CWE-288) Unauthenticated remote administrative access may be possible. EPSS rose +51.17% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2026-24858

Name: Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability · CISA KEV detail

Exploit added: 2026-01-27

Action due: 2026-01-30

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.

Exploit prediction scoring system (EPSS) score for CVE-2026-24858

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.95% 55.12% +51.17%
2 2026-06-11 4.80% 3.95% -0.85%
3 2026-06-06 — 4.80% —

Full EPSS history (37 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-24858

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2026-24858

GitHub Security Advisory for CVE-2026-24858

GHSA-2x38-48vp-w23x · Severity: critical — An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability...

Affected software / configurations for CVE-2026-24858

Vendor Product Version Raw CPE
fortinet fortianalyzer >= 7.0.0, <= 7.0.15 cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
fortinet fortianalyzer >= 7.2.0, <= 7.2.11 cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
fortinet fortianalyzer >= 7.4.0, < 7.4.10 cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
fortinet fortianalyzer >= 7.6.0, < 7.6.6 cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*
fortinet fortimanager >= 7.0.0, <= 7.0.15 cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*
fortinet fortimanager >= 7.2.0, <= 7.2.11 cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*
fortinet fortimanager >= 7.4.0, < 7.4.10 cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*
fortinet fortimanager >= 7.6.0, < 7.6.6 cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*
fortinet fortinac-f >= 7.6.3, < 7.6.6 cpe:2.3:a:fortinet:fortinac-f:*:*:*:*:*:*:*:*
fortinet fortiproxy >= 7.0.0, <= 7.0.22 cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
fortinet fortiproxy >= 7.2.0, <= 7.2.15 cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
fortinet fortiproxy >= 7.4.0, <= 7.4.12 cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
fortinet fortiproxy >= 7.6.0, <= 7.6.4 cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
fortinet fortiweb >= 7.4.0, <= 7.4.11 cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
fortinet fortiweb >= 7.6.0, <= 7.6.6 cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
fortinet fortiweb >= 8.0.0, <= 8.0.3 cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
fortinet fortios >= 7.0.0, <= 7.0.18 cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios >= 7.2.0, <= 7.2.12 cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios >= 7.4.0, < 7.4.11 cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios >= 7.6.0, < 7.6.6 cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
siemens ruggedcom_ape1808_firmware — cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*

References for CVE-2026-24858

cvelogic Threat Intelligence