CVE-2026-25836 is an OS command injection vulnerability in the vmimages update feature of Fortinet FortiSandbox Cloud 5.0.4 and FortiSandbox PaaS 5.0.4. The flaw is caused by improper neutralization of special elements used in an operating system command, allowing attacker-controlled input delivered through crafted HTTP requests to be incorporated into command execution. Exploitation requires authentication and a privileged account with the super-admin profile as well as CLI access. A successful attack can result in execution of unauthorized code or operating system commands on the affected appliance or service instance.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OS command injection vulnerability in the FortiSandbox vmimages update feature that requires authentication.
OS command injection in FortiSandbox Cloud vmimages update feature allowing an authenticated attacker to execute arbitrary OS commands via the GUI.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.