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Vulnerabilities / CVE-2026-24858

CVE-2026-24858

Published 2026-01-27 · published (not yet in NVD)

CVE-2026-24858

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-01-27, with a fix-by date of 2026-01-30. Patch it first.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

9.4 CRITICAL
CVSS 3.1 · CNA
87%
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)

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.

Scores

Affected products

  • Fortinet FortiWeb: 8.0.0 to ≤ 8.0.3; 7.6.0 to ≤ 7.6.6; 7.4.0 to ≤ 7.4.11
  • Fortinet FortiNAC-F: 7.6.3 to ≤ 7.6.5
  • Fortinet FortiOS: 7.6.0 to ≤ 7.6.5; 7.4.0 to ≤ 7.4.10; 7.2.0 to ≤ 7.2.12; 7.0.0 to ≤ 7.0.18
  • Fortinet FortiAnalyzer: 7.6.0 to ≤ 7.6.5; 7.4.0 to ≤ 7.4.9; 7.2.0 to ≤ 7.2.11; 7.0.0 to ≤ 7.0.15
  • Fortinet FortiProxy: 7.6.0 to ≤ 7.6.4; 7.4.0 to ≤ 7.4.12; 7.2.0 to ≤ 7.2.15; 7.0.0 to ≤ 7.0.22
  • Fortinet FortiManager: 7.6.0 to ≤ 7.6.5; 7.4.0 to ≤ 7.4.9; 7.2.0 to ≤ 7.2.11; 7.0.0 to ≤ 7.0.15

Weakness: CWE-288

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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