[NEW] [medium] Fortinet FortiOS: Multiple vulnerabilities enable code execution and DoS

mediumCVE-2026-71407 CVE-2026-71408

A remote, anonymous attacker can exploit multiple vulnerabilities in Fortinet FortiOS to execute arbitrary code or trigger a denial-of-service condition.

CSIRTS triage

vendor: Fortinet product: FortiOS Remote code execution Denial of service

What: A remote, anonymous attacker can exploit multiple vulnerabilities to execute arbitrary code or cause denial of service.
Who is affected: Any FortiOS deployment accessible remotely.
Urgency: High priority; unauthenticated remote code execution is a critical threat requiring immediate action.
Action: Apply Fortinet security patch for CVE-2026-71407 and CVE-2026-71408 immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-13
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2812

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-2026-714070.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-714080.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-71407	coverage & exploitation status	NVD · CVE.org
CVE-2026-71408	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownFortinet Products Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Fortinet products (August 13, 2026)cert-fr-avis
mediumCVE-2026-71408: A allocation of resources without limits or throttling vulnerability in Fortinet FortiOS 7.6.0…nvd
mediumCVE-2026-71407: A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 …nvd
unknownStack buffer overflow in WADfortinet
unknownUI DoS attackfortinet

Recent advisories for Fortinet FortiOS

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.

mediumCVE-2026-71408: A allocation of resources without limits or throttling vulnerability in Fortinet FortiOS 7.6.0…nvd · 2026-08-12
mediumCVE-2026-71407: A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 …nvd · 2026-08-12
high[UPDATE] [high] Fortinet FortiOS: Multiple Vulnerabilitiescert-bund · 2026-07-28
criticalexploitedCVE-2025-68686: Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerabilitycisa-kev · 2026-07-27
low[NEW] [low] Fortinet FortiProxy and FortiOS: Multiple vulnerabilitiescert-bund · 2026-07-15
medium[NEW] [medium] Fortinet FortiOS and FortiProxy: Multiple vulnerabilitiescert-bund · 2026-07-15