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CVE-2026-84393 (GCVE-0-2026-84393)

Vulnerability from cvelistv5 – Published: 2026-09-08 16:41 – Updated: 2026-09-08 17:30
VLAI
Summary
A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via <insert attack vector here>
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 17:30 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Fortinet FortiOS Affected: 7.6.1 , ≤ 7.6.6 (semver)
    cpe:2.3:o:fortinet:fortios:7.6.6:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.6.5:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.6.4:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.6.3:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.6.2:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.6.1:*:*:*:*:*:*:*
Create a notification for this product.
Fortinet FortiProxy Affected: 7.6.2 , ≤ 7.6.6 (semver)
    cpe:2.3:a:fortinet:fortiproxy:7.6.6:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortiproxy:7.6.5:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortiproxy:7.6.4:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortiproxy:7.6.3:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortiproxy:7.6.2:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
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                "timestamp": "2026-09-08T17:30:00.892429Z",
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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.