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CVE-2026-39810 Fortinet CVE debrief

A use of hard-coded cryptographic key vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5 may allow an attacker to achieve information disclosure via decrypting database dump. This vulnerability affects Fortinet FortiClientEMS versions 7.4.0 through 7.4.5. The vulnerability is a use of hard-coded cryptographic key, which may allow an attacker to achieve information disclosure via decrypting database dump. Defenders should assess potential exposure and impact in environments using Fortinet FortiClientEMS 7.4.0 through 7.4.5.

Vendor
Fortinet
Product
FortiClientEMS
CVSS
MEDIUM 6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-14
Original CVE updated
2026-10-26
Advisory published
2026-04-14
Advisory updated
2026-10-26

Who should care

Defenders and security teams using Fortinet FortiClientEMS 7.4.0 through 7.4.5 should assess potential exposure and impact. This includes verifying Fortinet FortiClientEMS version and exposure, assessing potential impact in environments using Fortinet FortiClientEMS 7.4.0 through 7.4.5, and monitoring for potential information disclosure attempts.

Why it matters

Defenders should prioritize verifying exposure and assessing potential impact, especially in environments using Fortinet FortiClientEMS 7.4.0 through 7.4.5, due to the use of hard-coded cryptographic key vulnerability.

  • Potential information disclosure via decrypting database dump
  • Verification of Fortinet FortiClientEMS version and exposure is necessary
  • Assessing potential impact in environments using Fortinet FortiClientEMS 7.4.0 through 7.4.5 is crucial

Technical summary

A use of hard-coded cryptographic key vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5 may allow an attacker to achieve information disclosure via decrypting database dump. The vulnerability is a use of hard-coded cryptographic key. This vulnerability affects Fortinet FortiClientEMS versions 7.4.0 through 7.4.5. Defenders should prioritize verifying exposure and assessing potential impact.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact, especially in environments using Fortinet FortiClientEMS 7.4.0 through 7.4.5.

Recommended defensive actions

  • Verify Fortinet FortiClientEMS version and check for updates to 7.4.6 or later
  • Assess potential exposure and impact in environments using Fortinet FortiClientEMS 7.4.0 through 7.4.5
  • Monitor for potential information disclosure attempts

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, additional information on potential exploitation and impact is limited. The CVE record was published on 2026-04-14T16:16:45.173Z and has not been modified since then. The NVD entry provides a detailed assessment of the vulnerability. There are no known reports of exploitation. However, defenders should verify exposure and assess potential impact, especially in environments using Fortinet FortiClientEMS 7.4.0-7.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-39810 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-39810

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-39810 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-39810

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.