CVE-2026-59837: 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

mediumCVSS 6.6CVE-2026-59837

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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.6
Published: 2026-07-14
Last updated: 2026-07-15
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-59837

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-598370.58% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-59837	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Fortinet FortiOS and FortiProxy: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Fortinet products (July 15, 2026)cert-fr-avis
unknownStack Buffer Overflow in Log Reportfortinet

Recent advisories for A stack-based buffer

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-67822: Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wi…nvd · 2026-07-31
unknownCVE-2026-67248: A stack-based buffer overflow vulnerability was found in the File Explorer on the ADM. The vul…nvd · 2026-07-30
mediumCVE-2026-13309: Autel MaxiCharger AC Elite Home NFC Stack-based Buffer Overflow Arbitrary Code Execution Vulne…nvd · 2026-07-29
highCVE-2026-5056: GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnera…nvd · 2026-07-29
unknownCVE-2026-12935: The TL-WR940N v6 router contains a vulnerability in its RTSP connection tracking module that c…nvd · 2026-07-29
unknownCVE-2026-55728: Stack-based Buffer Overflow (CWE-121) in `/usr/bin/ltsudo` `cmd_ipaddr_conflict` in Loytec LIP…nvd · 2026-07-24