CVE-2026-22828
Published: 14 April 2026
Summary
CVE-2026-22828 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Fortinet Fortianalyzer Cloud. Its CVSS base score is 8.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 40.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the heap-based buffer overflow vulnerability by identifying, patching, and testing updates for affected Fortinet FortiAnalyzer and FortiManager Cloud versions.
Validates specifically crafted requests to prevent improper handling that leads to the heap buffer overflow and remote code execution.
Implements memory protection mechanisms like ASLR and bounds checking to mitigate heap-based buffer overflow exploitation attempts.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap-based buffer overflow in public-facing Fortinet cloud services (FortiAnalyzer/FortiManager Cloud) enables remote unauthenticated RCE via crafted network requests, directly facilitating T1190: Exploit Public-Facing Application.
NVD Description
A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer Cloud 7.6.2 through 7.6.4, FortiManager Cloud 7.6.2 through 7.6.4 may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests. Successful exploitation would require a large amount…
more
of effort in preparation because of ASLR and network segmentation
Deeper analysisAI
CVE-2026-22828 is a heap-based buffer overflow vulnerability (CWE-122) affecting Fortinet FortiAnalyzer Cloud versions 7.6.2 through 7.6.4 and FortiManager Cloud versions 7.6.2 through 7.6.4. The flaw arises from improper handling of specifically crafted requests, potentially leading to remote code execution. It has a CVSS v3.1 base score of 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H), reflecting high impact but elevated attack complexity.
A remote unauthenticated attacker could exploit this vulnerability over the network by sending tailored requests to affected cloud instances. Successful exploitation may enable arbitrary code or command execution, compromising confidentiality, integrity, and availability. However, preparation demands significant effort due to protections like ASLR and network segmentation.
The Fortinet advisory FG-IR-26-121 provides details on mitigation, including recommended patches and workarounds; security practitioners should consult https://fortiguard.fortinet.com/psirt/FG-IR-26-121 for version-specific remediation guidance.
Details
- CWE(s)