How severe is CVE-2026-35616?

CVE-2026-35616 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2026-35616?

Affected package information for CVE-2026-35616 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2026-35616?

No fixed version has been published for CVE-2026-35616 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2026-35616 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-35616 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-35616?

CVE-2026-35616 has an EPSS (Exploit Prediction Scoring System) score of 34.8%, placing it in the 97th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2026-35616 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2026-35616 (Fortinet FortiClient EMS Improper Access Control Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-04-06. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-04-09. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2026-35616?

CVE-2026-35616 is classified as CWE-284 (CWE-284). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2026-35616?

CVE-2026-35616 affects fortinet forticlientems (2 versions, e.g. 7.4.5, 7.4.6). Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2026-35616?

A Nuclei detection template exists for CVE-2026-35616, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2026-35616 published, and has it been updated?

CVE-2026-35616 was published on April 4, 2026 and was last updated on April 6, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2026-04-06 — agencies required to remediate by 2026-04-09

CVE-2026-35616

CRITICAL

A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.

Published

Apr 4, 2026

Updated

Apr 6, 2026

Affected

0 pkgs

Patched

None yet

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

34.8%probability of exploitation in next 30 days

Moderate Risk97th percentile-6.42%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.

Affected Products

1 product · 2 configurations

Application

forticlientemsfortinet

2 versions

7.4.57.4.6

Frequently Asked Questions

A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.

O3 Security · Impact-Aware SCA

Is CVE-2026-35616 in your stack?

O3 detects CVE-2026-35616 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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