Exploited vulnerabilities / CVE-2026-35616
Confirmed exploited · exploited vulnerability · Fortinet FortiClient EMSCVE-2026-35616
Fortinet FortiClient EMS exploited vulnerability, confirmed exploited in the wild.
Fortinet FortiClient EMS contains an improper access control vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
| CISA's name for it | Fortinet FortiClient EMS Improper Access Control Vulnerability |
|---|---|
| Vendor and product | Fortinet · FortiClient EMS |
| Type | exploited vulnerability · CWE-284 |
| Exploited | Confirmed by CISA listed 6 April 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 9 April 2026 · already passed |
| Used in ransomware | Not reported |
| Advisories | fortiguard.fortinet.com ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited.
If you cannot patch now, restrict network access to the affected product.
Check for signs of compromise since the date it was added to the list.
| CISA's required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
|---|
Know before someone else finds it
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CVE-2026-35616 in short
Is CVE-2026-35616 being exploited?
Yes. CISA added CVE-2026-35616 to its Known Exploited Vulnerabilities catalogue on 6 April 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-35616?
US federal agencies must remediate it by 9 April 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-35616 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 94%, the 99th percentile of every CVE it scores.
How do I fix CVE-2026-35616?
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited. If you cannot patch now, restrict network access to the affected product. Check for signs of compromise since the date it was added to the list.
Other Fortinet vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2025-61624 | Multiple Products | path traversal | 16 October 2026 |
| CVE-2026-104286 | FortiMail | path traversal | 1 October 2026 |
| CVE-2025-25249 | Multiple Products | memory corruption | 9 September 2026 |
| CVE-2025-68686 | FortiOS | exploited vulnerability | 27 July 2026 |
| CVE-2026-25089 | FortiSandbox | command injection | 16 July 2026 |
| CVE-2026-39808 | FortiSandbox | command injection | 16 July 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.