CVE-2021-36169

MEDIUMNVD 4.26.0▲

4.2

A Hidden Functionality in Fortinet FortiOS 7.x before 7.0.1, FortiOS 6.4.x before 6.4.7 allows attacker to Execute unauthorized code or commands via specific hex read/write operations.

CVSS v3: 4.2
EG Score: 6.0(medium)
EPSS: 31.1%
KEV: Not listed

Published

December 13, 2021

Last Modified

November 21, 2024

References (2)

psirt@fortinethttps://fortiguard.com/advisory/FG-IR-21-091
af854a3a-2127-422b-91ae-364da2661108https://fortiguard.com/advisory/FG-IR-21-091

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-863Incorrect Authorization

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-36169?

CVE-2021-36169 is a medium vulnerability published on December 13, 2021. A Hidden Functionality in Fortinet FortiOS 7.x before 7.0.1, FortiOS 6.4.x before 6.4.7 allows attacker to Execute unauthorized code or commands via specific hex read/write operations.

When was CVE-2021-36169 disclosed?

CVE-2021-36169 was first published in the National Vulnerability Database on December 13, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-36169 actively exploited?

CVE-2021-36169 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-36169?

CVE-2021-36169 has a CVSS v3 base score of 4.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.0.

How do I remediate CVE-2021-36169?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-36169, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-36169

Explore →

Is Your Infrastructure Affected by CVE-2021-36169?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-36169

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36169?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)