# CVE-2026-59839: CVE-2026-59839

Status: published. Published: 2026-07-14. Updated: 2026-11-10.

A improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiPAM 1.8.0, FortiPAM 1.7.0 through 1.7.2, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>

## Remediation

- fix: Upgrade to FortiProxy version 7.6.6 or above
Upgrade to FortiOS version 8.0.0 or above
Upgrade to FortiOS version 7.6.7 or above
Upgrade to FortiOS version 7.4.10 or above
Fortinet remediated this issue in FortiSASE version 26.1.1 and hence customers do not need to perform any action.
Upgrade to FortiPAM version 1.9.0 or above
Upgrade to FortiPAM version 1.8.1 or above
Upgrade to FortiSwitchManager version 7.2.8 or above (source: CNA: fortinet)

## Affected products and versions

- Fortinet / FortiProxy: ≥ 7.6.0; ≤ 7.6.5 (affected, semver); ≥ 7.4.0; ≤ 7.4.13 (affected, semver); ≥ 7.2.0; ≤ 7.2.16 (affected, semver); ≥ 7.0.0; ≤ 7.0.23 (affected, semver). Source: CNA: fortinet
- Fortinet / FortiOS: ≥ 7.6.0; ≤ 7.6.6 (affected, semver); ≥ 7.4.0; ≤ 7.4.9 (affected, semver); ≥ 7.2.0; ≤ 7.2.13 (affected, semver); ≥ 7.0.0; ≤ 7.0.19 (affected, semver); ≥ 6.4.0; ≤ 6.4.16 (affected, semver). Source: CNA: fortinet
- Fortinet / FortiPAM: 1.8.0 (affected); ≥ 1.7.0; ≤ 1.7.2 (affected, semver); ≥ 1.6.0; ≤ 1.6.2 (affected, semver); ≥ 1.5.0; ≤ 1.5.1 (affected, semver); ≥ 1.4.0; ≤ 1.4.3 (affected, semver); ≥ 1.3.0; ≤ 1.3.1 (affected, semver); 1.2.0 (affected); ≥ 1.1.0; ≤ 1.1.2 (affected, semver); ≥ 1.0.0; ≤ 1.0.3 (affected, semver). Source: CNA: fortinet
- Siemens / RUGGEDCOM APE1808: ≥ 0; < * (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C; source: CNA: fortinet

- CISA KEV: No listing in collected sources

- EPSS: 0.25% as of 2026-11-09; percentile 16.61%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://fortiguard.fortinet.com/psirt/FG-IR-26-151 (CNA: fortinet)

- https://cert-portal.siemens.com/productcert/html/ssa-127084.html (ADP: siemens-SADP)

## Provenance

- CNA: fortinet: https://www.cve.org/CVERecord?id=CVE-2026-59839; retrieved 2026-11-10; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-59839; retrieved 2026-11-10; source updated Not reported

Revision: 6c38a7aafae403cd864dd8bbb5404b5672db39c5822e04868aab6bab2b864af4

Canonical: https://y2.dev/cve/CVE-2026-59839

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