CVE-2026-84393

highpriority · track · 0EPSS 0.003 · 20 %ileDENLRU
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.28% (20th) EPSS
CVSS 8.1 · high
Is it mine?
22 products
Check your exposure
Who says so?
3 sources
fstec_bdu · ncsc_nl · siemens_psirt

EPSS · scored 2026-10-25

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>

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedRUGGEDCOM APE1808siemens_psirt

    Update Fortigate NGFW to V7.6.7 or later following the secure update recommendation procedure. Contact customer support to receive detailed information

02

cvss

Technical severity, 0–10. One row per scoring source.

8.1
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.1highAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@fortinet.comexploitability 2.2 · impact 5.9
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Siemens ProductCERT DE
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · NCSC-NL NL
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-297USCWE-297USCWE-297USCWE-297US
05

affected products (22)

Products and version ranges known to be affected.

showing 20 of 22
06

advisories (2)

Vendor and ecosystem advisories describing this.

  • NCSC-2026-0355Kwetsbaarheden verholpen in Fortinet Forti-productenNL2026-09-09csaf · ncsc_nlNL

    Fortinet heeft kwetsbaarheden verholpen in FortiAnalyzer, FortiOS, FortiPAM, FortiProxy, FortiSandbox, FortiManager, FortiManager Cloud, FortiMonitorOnSight, FortiClient Windows, FortiSIEM en FortiSOAR.

  • SSA-127084SSA-127084: Multiple Vulnerabilities in Fortigate NGFW before V7.6.7 on RUGGEDCOM APE1808 Devices2026-08-11csaf · siemens_psirtDE

    Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens recommends to contact customer support for additional information, and follow Fortinet advisory for workarounds and mitigation measures.

07

also known as (1)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

fstec_bduncsc_nlsiemens_psirtNVDCVE.orgMITRE
published 2026-09-08modified 2026-10-15
09

references (2) nvd

External citations — patches, advisories, analysis.

scry

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