Which products and versions are affected by CVE-2026-24858?

Affected: Fortianalyzer (Fortinet) versions 7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15; Fortimanager (Fortinet) versions 7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15; FortiNAC-F (Fortinet) versions >= 7.6.3, among others. The full list is in the CVE brief.

Is CVE-2026-24858 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 27, 2026.

Is CVE-2026-24858 in the CISA KEV catalog?

Yes. It was added on Jan 27, 2026 with a federal remediation due date of Jan 30, 2026.

Is there a public exploit for CVE-2026-24858?

Public exploit code is available.

Is there a fix for CVE-2026-24858?

Fixed versions are available, including Fortianalyzer 7.0.15, Fortimanager 7.0.15, FortiNAC-F 7.6.6.

How urgently should CVE-2026-24858 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2026-24858

CriticalExploitedPublic exploit

Published Jan 27, 2026 · Updated Jun 9, 2026

Key Facts

Patch immediately

CVE-2026-24858 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Fortianalyzer (Fortinet), Fortimanager (Fortinet), FortiNAC-F (Fortinet) and 4 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 27, 2026. Public exploit code is available.
EPSS estimates a 86% probability of exploitation in the next 30 days.
Fixed versions are available, including Fortianalyzer 7.0.15, Fortimanager 7.0.15, FortiNAC-F 7.6.6.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

86%

Higher than 99.7% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-24858 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Jan 27, 2026	Jan 30, 2026	Not reported
Industry KEV feed	Jan 27, 2026	Jan 30, 2026	Not reported
CIRCL KEV	Jan 27, 2026	Jan 30, 2026	Not reported
ENISA EUVD	Jan 27, 2026	n/a	Not reported

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.

Affected Products

225 affected entries in total

Product	Affected versions	Fixed in
FortianalyzerFortinet	7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15	7.0.15
FortimanagerFortinet	7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15	7.0.15
FortiNAC-FFortinet	>= 7.6.3	7.6.6
FortiproxyFortinet	7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15	7.0.22
FortiwebFortinet	7.4.0, 7.4.1, 7.4.10, 7.4.11, 7.4.2, 7.4.3, 7.4.4, 7.4.5	7.4.11

2 more affected products in the full CVE brief

Patched Releases

Fortianalyzer

7.0.15

Fortimanager

7.0.15

FortiNAC-F

7.6.6

Fortios

7.0.18

Fortiproxy

7.0.22

Fortiweb

7.4.11

Timeline

Publicly disclosed
Jan 27, 2026
Added to CISA KEV
Jan 27, 2026
Added to Industry KEV feed
Jan 27, 2026
Added to CIRCL KEV
Jan 27, 2026
Added to ENISA EUVD
Jan 27, 2026
Last updated
Jun 9, 2026

Weakness Type

CWE-288 Authentication Bypass Using an Alternate Path or Channel

References

advisoryhttps://cert-portal.siemens.com/productcert/html/ssa-975644.html
advisoryhttps://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report

8 more references in the full CVE brief

FAQ

Common Questions.

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,…
Affected: Fortianalyzer (Fortinet) versions 7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15; Fortimanager (Fortinet) versions 7.0.0, 7.0.1, 7.0.10, 7.0.11, 7.0.12, 7.0.13, 7.0.14, 7.0.15; FortiNAC-F (Fortinet) versions >= 7.6.3, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 27, 2026.
Yes. It was added on Jan 27, 2026 with a federal remediation due date of Jan 30, 2026.
Public exploit code is available.
Fixed versions are available, including Fortianalyzer 7.0.15, Fortimanager 7.0.15, FortiNAC-F 7.6.6.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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