Authentication bypass by capture-replay in Fortinet FortiClientEMS
Priority MEDIUM 41CWE-294Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-294.
Summary
An authentication bypass by capture-replay vulnerability [CWE-294] in FortiClient EMS versions 7.0.1 and below and 6.4.4 and below may allow an unauthenticated attacker to impersonate an existing user by intercepting and re-using valid SAML authentication messages.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00987 62nd 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
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Fortinet | Fortinet FortiClientEMS | FortiClientEMS 7.0.1, 7.0.0, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0 | — | No fix listed | CNA |
- Fortinet FortiClientEMS VendorFortinet Affected FortiClientEMS 7.0.1, 7.0.0, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fortinet:forticlient_enterprise_management_server:*:*:*:*:*:*:*:* | 6.2.0 – 6.2.9; 6.4.0 – 6.4.4 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:forticlient_enterprise_management_server:7.0.0:*:*:*:*:*:*:* | 7.0.0 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:forticlient_enterprise_management_server:7.0.1:*:*:*:*:*:*:* | 7.0.1 | Vulnerable | Fortinet |
- cpe:2.3:a:fortinet:forticlient_enterprise_management_server:*:*:*:*:*:*:*:* Versions 6.2.0 – 6.2.9; 6.4.0 – 6.4.4 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:forticlient_enterprise_management_server:7.0.0:*:*:*:*:*:*:* Versions 7.0.0 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:forticlient_enterprise_management_server:7.0.1:*:*:*:*:*:*:* Versions 7.0.1 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41030
- 2026-10-03 Alias added: GHSA-g3q6-jxj3-44v3
References
More Fortinet Forticlient Enterprise Management Server vulnerabilities
- TI-2023-26617 SQL injection in Fortinet FortiClientEMS KEVCVSS 3.1CRITICAL 9.8
- TI-2024-22101 Command injection in Fortinet FortiClientEMS CVSS 3.1HIGH 7.3
- TI-2023-24385 Improper privilege management in Fortinet FortiClientEMS CVSS 3.1HIGH 7.9
- TI-2021-12263 Uncontrolled search path in Fortinet FortiClientWindows, FortiClientEMS CVSS 3.1HIGH 7.8
- TI-2021-14607 A missing encryption of sensitive data in Fortinet FortiClientEMS version 7.0.1 and… CVSS 3.1MEDIUM 6.8
- TI-2020-12553 Cross-site scripting in Fortinet FortiClientEMS CVSS 3.1MEDIUM 5.4
Sources
- CVE-2021-41030 · CVE Program
- CVE-2021-41030 · NVD
- FIRST EPSS
- GHSA-g3q6-jxj3-44v3 · GitHub Advisory Database · CC BY 4.0
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