CVE-2021-26103

mediumpriority · track · 35OT risk · elevatedEPSS 0.004 · 38 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.44% (38th) EPSS

CVSS 5.1 · medium

Is it mine?

8 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-26

An insufficient verification of data authenticity vulnerability (CWE-345) in the user interface of FortiProxy verison 2.0.3 and below, 1.2.11 and below and FortiGate verison 7.0.0, 6.4.6 and below, 6.2.9 and below of SSL VPN portal may allow a remote, unauthenticated attacker to conduct a cross-site request forgery (CSRF) attack . Only SSL VPN in web mode or full mode are impacted by this vulnerability.

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.1–8.8

v2.05.1mediumAV:N/AC:H/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 4.9 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:F/RL:X/RC:Xsecondary · ENISA EU

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondary · psirt@fortinet.comexploitability 2.8 · impact 3.4

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-345USprimary

affected products (8)

Products and version ranges known to be affected.

Fortinet Fortinet FortiOS≤ FortiOS 7.0.0, 6.4.5, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 6.0.14, 6.0.13, 6.0.12, 6.0.11, 6.0.10, 6.0.9, 6.0.8, 6.0.7, 6.0.6, 6.0.5, 6.0.4, 6.0.3, 6.0.2, 6.0.1, 6.0.0, 5.6.14, 5.6.13, 5.6.12, 5.6.11, 5.6.10, 5.6.9, 5.6.8, 5.6.7, 5.6.6, 5.6.5, 5.6.4, 5.6.3, 5.6.2, 5.6.1, 5.6.0enisa_euvdEU
fortinet fortios5.6.0 → 5.6.14nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios6.0.0 → 6.0.13nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios6.2.0 → 6.2.9nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios6.4.0 → 6.4.6nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortios= 7.0.0nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet fortiproxy1.2.0 → 1.2.11nvdUScpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
fortinet fortiproxy2.0.0 → 2.0.3nvdUScpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-12-08modified 2026-06-17

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+1433 more

references (8)

External citations — patches, advisories, analysis.

scry

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