CVE-2026-21743

mediumpriority · track · 0OT risk · elevatedEPSS 0.004 · 32 %ileEUNLUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.38% (32nd) EPSS

CVSS 6.8 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · ncsc_nl · nvd

EPSS · scored 2026-10-27

A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow a read-only user to make modification to local users via a file upload to an unprotected endpoint.

cvss

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

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.2

v3.16.8mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:Csecondary · ENISA EU

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@fortinet.comexploitability 1.2 · impact 5.9

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · NCSC-NL NL

ssvc

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-862USCWE-862US

affected products (9)

Products and version ranges known to be affected.

Fortinet FortiAuthenticator≤ 6.3.0 ≤6.3.5enisa_euvdEU
Fortinet FortiAuthenticator≤ 6.6.0 ≤6.6.6enisa_euvdEU
Fortinet FortiAuthenticator≤ 6.4.0 ≤6.4.11enisa_euvdEU
Fortinet FortiAuthenticator≤ 6.5.0 ≤6.5.7enisa_euvdEU
Fortinet FortiAuthenticator≤ vers:unknown/*ncsc_nlNL
Fortinet FortiClient≤ vers:unknown/*ncsc_nlNL
Fortinet FortiClientWindows≤ vers:unknown/*ncsc_nlNL
Fortinet FortiSandbox≤ vers:unknown/*ncsc_nlNL
fortinet fortiauthenticator6.3.0 → 6.6.7nvdUScpe:2.3:a:fortinet:fortiauthenticator:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

NCSC-2026-0060Kwetsbaarheden verholpen in Fortinet FortiSandbox, FortiAuthenticator en FortiClientNL2026-02-11csaf · ncsc_nlNL
Fortinet heeft kwetsbaarheden verholpen in FortiSandbox (versies 4.4.8 en 5.0.5), FortiAuthenticator (versies 6.3 tot 6.6.6) en FortiClient (versies 7.0, 7.2 en 7.4).

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd ncsc_nl nvd NVD CVE.org MITRE

published 2026-02-10modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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