Unauthenticated VNC access exposed on all interfaces

unknownCVE-2026-59835

CVSSv3 Score: 7.7 An Exposure of Resource to Wrong Sphere vulnerability [CWE-668] in FortiSandbox may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests. Revised on 2026-07-14 00:00:00

CSIRTS triage

vendor: Fortinet product: FortiSandboxOther

What: An unauthenticated attacker may access the VNC server of VMs performing scanning via network requests.
Who is affected: Deployments of FortiSandbox with VNC access enabled.
Urgency: Remediation is urgent due to the potential for unauthorized access.
Action: Restrict VNC access to authenticated users only.

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

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Details

Source: Fortinet FortiGuard PSIRT (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-145

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-2026-598350.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-59835	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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