Read the docs
TI-2026-20057 Aliases CVE-2026-24858GHSA-2x38-48vp-w23x

Authentication bypass in Fortinet FortiWeb

Priority CRITICAL 100Exploited in the wildCWE-288Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-288.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2026-01-27CISA due date 2026-01-30
EPSS 0.86592 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FortinetFortiWeb8.0.0 – 8.0.3; 7.6.0 – 7.6.6; 7.4.0 – 7.4.11—No fix listedCNA
FortinetFortiNAC-F7.6.3 – 7.6.5—No fix listedCNA
FortinetFortiOS7.6.0 – 7.6.5; 7.4.0 – 7.4.10; 7.2.0 – 7.2.12; 7.0.0 – 7.0.18—No fix listedCNA
FortinetFortiAnalyzer7.6.0 – 7.6.5; 7.4.0 – 7.4.9; 7.2.0 – 7.2.11; 7.0.0 – 7.0.15—No fix listedCNA
FortinetFortiProxy7.6.0 – 7.6.4; 7.4.0 – 7.4.12; 7.2.0 – 7.2.15; 7.0.0 – 7.0.22—No fix listedCNA
FortinetFortiManager7.6.0 – 7.6.5; 7.4.0 – 7.4.9; 7.2.0 – 7.2.11; 7.0.0 – 7.0.15—No fix listedCNA
  • FortiWeb VendorFortinet Affected 8.0.0 – 8.0.3; 7.6.0 – 7.6.6; 7.4.0 – 7.4.11 Fixed in — No fix listed CNA
  • FortiNAC-F VendorFortinet Affected 7.6.3 – 7.6.5 Fixed in — No fix listed CNA
  • FortiOS VendorFortinet Affected 7.6.0 – 7.6.5; 7.4.0 – 7.4.10; 7.2.0 – 7.2.12; 7.0.0 – 7.0.18 Fixed in — No fix listed CNA
  • FortiAnalyzer VendorFortinet Affected 7.6.0 – 7.6.5; 7.4.0 – 7.4.9; 7.2.0 – 7.2.11; 7.0.0 – 7.0.15 Fixed in — No fix listed CNA
  • FortiProxy VendorFortinet Affected 7.6.0 – 7.6.4; 7.4.0 – 7.4.12; 7.2.0 – 7.2.15; 7.0.0 – 7.0.22 Fixed in — No fix listed CNA
  • FortiManager VendorFortinet Affected 7.6.0 – 7.6.5; 7.4.0 – 7.4.9; 7.2.0 – 7.2.11; 7.0.0 – 7.0.15 Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*7.0.0 – 7.0.15; 7.2.0 – 7.2.11; 7.4.0 to before 7.4.10; 7.6.0 to before 7.6.6VulnerableFortinet
cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*7.0.0 – 7.0.15; 7.2.0 – 7.2.11; 7.4.0 to before 7.4.10; 7.6.0 to before 7.6.6VulnerableFortinet
cpe:2.3:a:fortinet:fortinac-f:*:*:*:*:*:*:*:*7.6.3 to before 7.6.6VulnerableFortinet
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*7.0.0 – 7.0.22; 7.2.0 – 7.2.15; 7.4.0 – 7.4.12; 7.6.0 – 7.6.4VulnerableFortinet
cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*7.4.0 – 7.4.11; 7.6.0 – 7.6.6; 8.0.0 – 8.0.3VulnerableFortinet
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*7.0.0 – 7.0.18; 7.2.0 – 7.2.12; 7.4.0 to before 7.4.11; 7.6.0 to before 7.6.6VulnerableFortinet
cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableSiemens
cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:* Versions 7.0.0 – 7.0.15; 7.2.0 – 7.2.11; 7.4.0 to before 7.4.10; 7.6.0 to before 7.6.6 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:* Versions 7.0.0 – 7.0.15; 7.2.0 – 7.2.11; 7.4.0 to before 7.4.10; 7.6.0 to before 7.6.6 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortinac-f:*:*:*:*:*:*:*:* Versions 7.6.3 to before 7.6.6 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* Versions 7.0.0 – 7.0.22; 7.2.0 – 7.2.15; 7.4.0 – 7.4.12; 7.6.0 – 7.6.4 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* Versions 7.4.0 – 7.4.11; 7.6.0 – 7.6.6; 8.0.0 – 8.0.3 Vulnerable ·Fortinet
  • cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 7.0.0 – 7.0.18; 7.2.0 – 7.2.12; 7.4.0 to before 7.4.11; 7.6.0 to before 7.6.6 Vulnerable ·Fortinet
  • cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
  • cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-01-27 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-24858
  3. 2026-10-03 Alias added: GHSA-2x38-48vp-w23x

References

Advisory 3

  • TI-2023-10911 A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of… CVSS 3.1CRITICAL 9.3
  • TI-2023-23782 Path traversal in Fortinet FortiAnalyzer CVSS 3.1MEDIUM 6.5
  • TI-2021-12260 Use after free in Fortinet FortiManager CVSS 3.1CRITICAL 9.8
  • TI-2024-33992 Weak authentication in Fortinet FortiAnalyzer CVSS 3.1CRITICAL 9.8
  • TI-2024-15684 A client-side enforcement of server-side security in Fortinet FortiAnalyzer-BigData at… CVSS 3.1HIGH 8.8
  • TI-2020-10186 Cross-site scripting in Fortinet FortiAnalyzer CVSS 3.1HIGH 8.8
See all 91 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences