Is CVE-2026-126212 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-126212 being exploited in the wild.

How severe is CVE-2026-126212?

High severity, with a CVSS score of 7.2, published 11 November 2026.

Which products and versions are affected?

Fortinet Fortianalyzer 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11; Fortinet Fortianalyzer Cloud 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.1 through 7.4.11; Fortinet FortiManager 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11; Fortinet FortiManager Cloud 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.1 through 7.4.11.

Is there a fix for CVE-2026-126212?

Yes: fixed in FortiAnalyzer 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiAnalyzer Cloud 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiManager 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiManager Cloud 8.0.2 or above, 7.6.8 or above, 7.4.12 or above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-126212 attacked?

It is attacked over the network.

Am I affected by CVE-2026-126212?

Check whether you run Fortinet Fortianalyzer, Fortinet Fortianalyzer Cloud, Fortinet FortiManager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-126212: Fortinet FortiAnalyzer heap-based buffer overflow in JSON-RPC API

CVE-2026-126212 · Severity: high · CVSS 7.2 · Published 2026-11-11

FortiAnalyzer and FortiManager are centralized management and log analysis platforms that monitor and control enterprise firewalls and security infrastructure. A heap-based buffer overflow in their JSON-RPC API allows authenticated administrators to execute arbitrary code or crash the system by sending specially crafted requests. This could enable a malicious admin to compromise the entire managed security infrastructure or disrupt operations.

Technologies: Fortinet Fortianalyzer, Fortinet Fortianalyzer Cloud, Fortinet FortiManager, Fortinet FortiManager Cloud. Vendors: Fortinet.

Quick answers

Is CVE-2026-126212 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-126212 being exploited in the wild.
How severe is CVE-2026-126212?: High severity, with a CVSS score of 7.2, published 11 November 2026.
Which products and versions are affected?: Fortinet Fortianalyzer 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11; Fortinet Fortianalyzer Cloud 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.1 through 7.4.11; Fortinet FortiManager 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11; Fortinet FortiManager Cloud 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.1 through 7.4.11.
Is there a fix for CVE-2026-126212?: Yes: fixed in FortiAnalyzer 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiAnalyzer Cloud 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiManager 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiManager Cloud 8.0.2 or above, 7.6.8 or above, 7.4.12 or above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-126212 attacked?: It is attacked over the network.
Am I affected by CVE-2026-126212?: Check whether you run Fortinet Fortianalyzer, Fortinet Fortianalyzer Cloud, Fortinet FortiManager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: FortiAnalyzer 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiAnalyzer Cloud 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiManager 8.0.2 or above, 7.6.8 or above, 7.4.12 or above; FortiManager Cloud 8.0.2 or above, 7.6.8 or above, 7.4.12 or above

Technical details

A heap-based buffer overflow (CWE-122) exists in the JSON-RPC API component of FortiAnalyzer, FortiAnalyzer Cloud, FortiManager, and FortiManager Cloud. The vulnerability requires authentication as an administrator and is triggered via malformed JSON-RPC requests. Successful exploitation allows arbitrary code execution or denial of service.

Affected products

Fortinet FortiAnalyzer 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11
Fortinet FortiAnalyzer Cloud 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.1 through 7.4.11
Fortinet FortiManager 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11
Fortinet FortiManager Cloud 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.1 through 7.4.11

Timeline

2026-11-10: disclosed

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-232

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