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CVE-2025-54820 is a stack-based buffer overflow vulnerability in the FortiManager fgtupdates service. It affects FortiManager 7.4.0 through 7.4.2, 7.2.0 through 7.2.10, and all 6.4 versions. A remote unauthenticated attacker may be able to trigger the flaw by sending crafted requests to the exposed service when fgtupdates is enabled. The vulnerability can lead to execution of unauthorized commands, and available reporting indicates the attack path may potentially be developed toward remote code execution. Exploitation complexity is increased because successful compromise depends on bypassing stack protection mechanisms present on the target.
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What an attacker gets, and what they’ve been doing with it.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Stack-based buffer overflow in FortiManager fgtupdates service that could potentially be triggered for remote code execution via a crafted update request.
A high-severity stack-based buffer overflow in FortiManager’s fgtupdates service that can allow remote, unauthenticated attackers to execute unauthorized commands / potentially achieve code execution, conditional on the service being enabled and requiring bypass of stack protections.
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.