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CVE-2026-26035 is an improper authentication vulnerability in Fortinet FortiWeb's remote administrator authentication mechanism. In affected deployments using Remote RADIUS Type administrator authentication with the non-default Wildcard option enabled, FortiWeb can incorrectly match arbitrary remote usernames to an administrator account or group. A remote unauthenticated attacker can consequently authenticate to the FortiWeb GUI or CLI with an arbitrary username and password. Affected releases are FortiWeb 8.0.0 through 8.0.2, 7.6.0 through 7.6.6, 7.4.0 through 7.4.11, 7.2.0 through 7.2.12, and 7.0.0 through 7.0.12.
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No public exploit code observed for this vulnerability.
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22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An improper authentication vulnerability affecting FortiWeb.
A high-severity FortiWeb vulnerability that can allow remote, unauthenticated access to instances using arbitrary credentials if the wildcard option is enabled for the Remote-Type administrator account.
An improper authentication vulnerability in FortiWeb’s login mechanism that can allow a remote unauthenticated attacker to gain administrative access when Remote RADIUS Type authentication is configured with the wildcard setting enabled.
A critical FortiWeb authentication bypass vulnerability in the remote administrator authentication mechanism over RADIUS that can let an unauthenticated remote attacker log into the administrative console using arbitrary credentials when the Wildcard option is enabled.
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.