CVE-2026-59840

mediumpriority · track · 0EPSS 0.003 · 23 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.31% (23rd) EPSS

CVSS 4.1 · medium

Is it mine?

34 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · siemens_psirt

EPSS · scored 2026-10-22

A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to information disclosure via <insert attack vector here>

remediations

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

A vendor fix is available.

FixedRUGGEDCOM APE1808siemens_psirt
Update Fortigate NGFW to V7.6.6 or later following the secure update recommendation procedure. Contact customer support to receive detailed information

cvss

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

4.3

010

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

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:Csecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · psirt@fortinet.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · Siemens ProductCERT DE

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/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-126USCWE-126US

affected products (34)

Products and version ranges known to be affected.

Fortinet FortiOS <7.4.9all versionscert_bundDE
Fortinet FortiOS <7.6.4all versionscert_bundDE
Fortinet FortiProxy <7.4.14all versionscert_bundDE
Fortinet FortiProxy <7.6.5all versionscert_bundDE
Fortinet FortiProxy <7.6.6all versionscert_bundDE
Fortinet FortiOS< 7.4.9cert_bundDE
Fortinet FortiOS< 7.6.4cert_bundDE
Fortinet FortiProxy< 7.4.14cert_bundDE
Fortinet FortiProxy< 7.6.5cert_bundDE
Fortinet FortiProxy< 7.6.6cert_bundDE
Fortinet FortiOS≤ 7.2.0 ≤7.2.13enisa_euvdEU
Fortinet FortiOS≤ 7.6.0 ≤7.6.3enisa_euvdEU
Fortinet FortiOS≤ 7.4.0 ≤7.4.8enisa_euvdEU
Fortinet FortiOS≤ 7.0.0 ≤7.0.19enisa_euvdEU
Fortinet FortiOS≤ 6.4.0 ≤6.4.16enisa_euvdEU
Fortinet FortiPAM≤ 1.4.0 ≤1.4.3enisa_euvdEU
Fortinet FortiPAM≤ 1.6.0 ≤1.6.2enisa_euvdEU
Fortinet FortiPAM≤ 1.2.0enisa_euvdEU
Fortinet FortiPAM≤ 1.0.0 ≤1.0.3enisa_euvdEU
Fortinet FortiPAM≤ 1.5.0 ≤1.5.1enisa_euvdEU

showing 20 of 34

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-864900SSA-864900: Multiple Vulnerabilities in Fortigate NGFW before V7.6.6 on RUGGEDCOM APE1808 Devices2025-05-13csaf · siemens_psirtDE
Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version.
WID-SEC-W-2026-2329Fortinet FortiProxy und FortiOS: Mehrere SchwachstellenDeutsch2026-07-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Fortinet FortiOS und Fortinet FortiProxy ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren und Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund siemens_psirt NVD CVE.org MITRE

published 2026-07-14modified 2026-08-11

references (4)

External citations — patches, advisories, analysis.

scry

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