Stack-based Buffer Overflow in FortiManager fgtupdates Service
CVE-2025-54820 is a high-severity stack-based buffer overflow in the Fortinet FortiManager fgtupdates service. According to the provided content, affected versions are FortiManager 7.4.0 through 7.4.2, 7.2.0 through 7.2.10, and all 6.4 versions; FortiManager 7.6 and FortiManager Cloud are not affected. A remote unauthenticated attacker may trigger the flaw by sending specially crafted requests to the fgtupdates service when that service is enabled. Successful exploitation may allow execution of unauthorized commands, and the content further indicates potential remote code execution risk. Exploitability depends on the attacker’s ability to bypass existing stack protection mechanisms.
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
8 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.
The version that knows your environment.
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.