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CVE-2026-26035 is an improper authentication vulnerability in Fortinet FortiWeb affecting versions 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. The flaw affects FortiWeb deployments that use remote administrator authentication via RADIUS under specific non-default settings, specifically when the wildcard administrator matching option is enabled. Under those conditions, a remote unauthenticated attacker can authenticate to the FortiWeb GUI or CLI using an arbitrarily chosen username and password, resulting in authentication bypass of the administrative interface.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.
An improper authentication vulnerability in FortiWeb that can allow a remote unauthenticated attacker to log in to the FortiWeb GUI/CLI with a random username and password when a specific non-default wildcard administrator setting is enabled.
An improper authentication vulnerability in Fortinet FortiWeb that may allow a remote unauthenticated attacker to log into the FortiWeb GUI/CLI using a random username and password.
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.