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CVE-2023-47537 is an improper certificate validation vulnerability in Fortinet FortiOS affecting FortiOS 7.4.0 through 7.4.1, 7.2.0 through 7.2.6, 7.0.0 through 7.0.15, and all FortiOS 6.4 versions. The flaw affects the FortiLink communication channel between a FortiOS device and FortiSwitch. Because certificate validation is not performed correctly, a remote, unauthenticated attacker positioned on the network path can impersonate a trusted endpoint and intercept protected communications, enabling a man-in-the-middle condition on the FortiLink channel.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Improper certificate validation vulnerability in Fortinet FortiOS.
A referenced vulnerability listed with CVSS 4.4, but no further details are provided in the content.
Referenced by CVE ID and CVSS score only; no further details are provided in the content.
A vulnerability (rated Medium in this content) disclosed alongside other Fortinet-related advisories; exploitation is not indicated here.
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.