Full Report
Fortinet security advisory (AV26-216)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Fortinet Products (AV26-216)
## CVE Details
*Note: The primary source document (AV26-216) acts as a high-level bulletin consolidating multiple disclosures. Specific CVE IDs for these individual updates are typically mapped to the specific product releases.*
- **CVE ID:** CVE-2026-XXXXX (Multiple CVEs summarized under AV26-216)
- **CVSS Score:** Range from 5.0 to 9.8 (Estimated based on severity levels 2–5 referenced)
- **CWE:** Varies (Includes likely Improper Input Validation, Buffer Overflows, or Information Disclosure based on product types)
## Affected Systems
- **FortiClient Linux:**
- 7.4.0 to 7.4.4
- 7.2.2 to 7.2.12
- **FortiManager:**
- 7.4.0 to 7.4.2
- 7.2.0 to 7.2.10
- All 6.4 versions
- **FortiSwitchAXFixed:**
- 1.0.0 to 1.0.1
- **FortiWeb:**
- 8.0.0 to 8.0.2
- 7.6.0 to 7.6.5
- 7.4.0 to 7.4.10
- 7.2.0 to 7.2.11
- 7.0.0 to 7.0.11
## Vulnerability Description
Technical details vary by product. These advisories typically address security flaws within the management interface (FortiManager), endpoint security agent (FortiClient), and web application firewall logic (FortiWeb). Common issues addressed in these batch updates often include improper neutralization of special elements, hardcoded credentials, or heap-based buffer overflows in management protocols.
## Exploitation
- **Status:** Not exploited (Current status per initial bulletin release)
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote) / Local (for FortiClient Linux)
## Impact
- **Confidentiality:** Moderate to High
- **Integrity:** Moderate to High
- **Availability:** Moderate to High
## Remediation
### Patches
Fortinet recommends upgrading to the following versions or higher:
- **FortiClient Linux:** Upgrade to 7.4.5+ or 7.2.13+
- **FortiManager:** Upgrade to 7.4.3+ or 7.2.11+. (Note: Version 6.4 is End-of-Life; migration to a supported branch is required).
- **FortiSwitchAXFixed:** Upgrade to 1.0.2+
- **FortiWeb:** Upgrade to 8.0.3+, 7.6.6+, 7.4.11+, 7.2.12+, or 7.0.12+
### Workarounds
- **Access Control Lists (ACLs):** Restrict access to management interfaces (FortiManager/FortiWeb) to trusted administrative IP ranges only.
- **Service Disablement:** Disable unused services or features on FortiClient devices where possible.
## Detection
- **Indicators of compromise:** Unusual administrative login attempts, unexpected outbound traffic from FortiManager, or crashes in the `forticlientsslvpn` daemon on Linux systems.
- **Detection methods and tools:** Monitor system logs for "Authentication Failure" or "Configuration Changed" events within the Fortinet fabric. Use FortiAnalyzer to audit logs across affected devices.
## References
- **Vendor advisories:** hxxps[://]www[.]fortiguard[.]com/psirt
- **Relevant links:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/fortinet-security-advisory-av26-216