Fortinet FortiAnalyzer and FortiManager: Heap-based Buffer Overflow (CVE-2026-126178)
A heap-based buffer overflow vulnerability in multiple versions of FortiAnalyzer and FortiManager allows an authenticated administrative attacker to achieve remote code execution via a crafted request.
CVE search metadata
CVE search record: CVE-2026-126178. Severity: high. CVSS: 7.2. KEV: no. Product: FortiAnalyzer (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12), FortiAnalyzer Cloud (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12), FortiManager (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12), FortiManager Cloud (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12). Brief: Fortinet FortiAnalyzer and FortiManager: Heap-based Buffer Overflow (CVE-2026-126178). Brief link: https://feed.craftedsignal.io/briefs/2026-11-fortinet-fortianalyzer-fortimanager-rce-cve-2026-126178/
Triage facts
Revision 1- Applicability
- FortiAnalyzer (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12), FortiAnalyzer Cloud (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.1-7.4.11, 7.2.1-7.2.12) +2
- Evidence
- Unknown
- Severity
- High
- Action
- Elevated
- Sources
- 1 public source
- Freshness
- Revision 1Nov 12, 00:17 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A1Roughly even chance
A heap-based buffer overflow vulnerability (CVE-2026-126178) exists in various versions of Fortinet FortiAnalyzer, FortiAnalyzer Cloud, FortiManager, and FortiManager Cloud. This vulnerability can be exploited by an authenticated attacker with administrative privileges to execute unauthorized code or commands on the targeted appliance by sending a crafted request.
Impact
Successful exploitation allows an authenticated administrative attacker to execute unauthorized code or commands, potentially compromising the confidentiality, integrity, and availability of the affected Fortinet management or analysis platforms.
Recommendation
- Identify all instances of FortiAnalyzer, FortiAnalyzer Cloud, FortiManager, and FortiManager Cloud within the enterprise environment.
- Review vendor advisories for patching requirements corresponding to the affected versions (8.0.0-8.0.1, 7.6.0-7.6.7, 7.4.0-7.4.11, 7.2.0-7.2.12).
- Implement the principle of least privilege for administrative accounts to restrict the pool of potential attackers capable of exploiting this vulnerability.
Immediate actions
Inventory affected FortiAnalyzer and FortiManager appliances to confirm version levels
Threat Hunt
Monitor administrative session logs for anomalous command execution patterns or abnormal payloads targeting management interfaces
Data: FortiAnalyzer/FortiManager administrative audit logs
Mitigations
Patch affected versions of FortiAnalyzer and FortiManager according to vendor release notes
CVE-2026-126178