CVE-2026-59837: Stack Buffer Overflow in Log Report

Published Jul 14, 2026
·
Updated

A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiOS, FortiProxy and FortiPAM may allow a privileged authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests.

Other sources

A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2 all versions, FortiPAM 1.8.0 through 1.8.2, FortiPAM 1.7 all versions, 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 7.4.0 through 7.4.13, FortiProxy 7.2 all versions may allow a privileged authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests.

— MITRE

Affected Software

16 affected componentsFixes available
Fortinet FortiOS>=7.4.0<=7.4.1
Fortinet FortiOS>=7.2
Fortinet FortiPAM>=1.8.0<=1.8.2
Fortinet FortiPAM>=1.7
Fortinet FortiPAM>=1.6
Fortinet FortiPAM>=1.5
Fortinet FortiPAM>=1.4
Fortinet FortiPAM>=1.3
Fortinet FortiPAM>=1.2
Fortinet FortiPAM>=1.1
Fortinet FortiPAM>=1.0
Fortinet FortiProxy>=7.4.0<=7.4.13
Fortinet FortiProxy>=7.2
Fortinet FortiProxy>=7.2.0<7.4.14
Fortinet FortiOS>=7.2.0<7.4.2
Fortinet FortiPAM>=1.0.0<1.8.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.4.2
  2. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.6.0
  3. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 8.0.0
  4. Upgrade

    Upgrade FortiPAM to a version that resolves this vulnerability.

    Fixed in 1.8.3
  5. Upgrade

    Upgrade FortiPAM to a version that resolves this vulnerability.

    Fixed in 1.9.0
  6. Upgrade

    Upgrade FortiProxy to a version that resolves this vulnerability.

    Fixed in 7.4.14
  7. Upgrade

    Upgrade FortiProxy to a version that resolves this vulnerability.

    Fixed in 7.6.0

Event History

Jul 14, 2026
Advisory Published
via FortiGuard·12:00 AM
Data Sourced
via FortiGuard·12:00 AM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·03:06 PM
Data Sourced
via MITRE·03:06 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·04:17 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-59837?

The severity of CVE-2026-59837 is medium with a base score of 6.6.

2

How do I fix CVE-2026-59837?

To fix CVE-2026-59837, update your Fortinet FortiOS, FortiProxy, or FortiPAM to the latest patch provided by the vendor.

3

Who is affected by CVE-2026-59837?

CVE-2026-59837 affects users of Fortinet FortiOS, FortiProxy, and FortiPAM that allow privileged authenticated access.

4

What type of vulnerability is CVE-2026-59837?

CVE-2026-59837 is a stack-based buffer overflow vulnerability that can be exploited through crafted HTTP requests.

5

What can an attacker achieve by exploiting CVE-2026-59837?

An attacker who exploits CVE-2026-59837 can execute arbitrary code or commands on the affected systems.

Company

Resources

Contact

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