Medium6.2Fortinet

Medium [CVE-2025-53847] Missing Authentication for critical function in CAPWAP daemon

This medium-severity Fortinet advisory covers CVE-2025-53847 affecting FortiOS, FortiGate, FortiSwitch.

FG-IR-26-125 Published Apr 14, 2026Updated by vendor Apr 14, 2026

CVE-2025-53847

Affected products & platforms

FortinetFortiGateFirewallFortiOSFortiSwitch

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Summary

CVSSv3 Score:

6.2

A missing authentication for critical function vulnerability [CWE-306] in FortiOS and FortiSwitchManager CAPWAP daemon may allow a local unauthenticated attacker on the same local IP subnet to write device configuration via specially crafted requests.

To be successful, this attack requires the targeted FortiGate device to run a specific, non default configuration.

Revised on 2026-04-14 00:00:00

Affected versions

FortiOS 7.6: 7.6.0 through 7.6.3
FortiOS 7.4: 7.4.0 through 7.4.8
FortiOS 7.2: 7.2.0 through 7.2.11
FortiOS 7.0: 7.0.0 through 7.0.17
FortiOS 6.4: 6.4 all versions
FortiOS 6.2: 6.2.9 through 6.2.17

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

FortiOS 7.6: 7.6.4
FortiOS 7.4: 7.4.9
FortiOS 7.2: 7.2.12
FortiOS 7.0: 7.0.18
FortiOS 6.4: migrate to a fixed release
FortiOS 6.2: migrate to a fixed release

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade per the Affected/Solution table: FortiOS 7.6: 7.6.4; FortiOS 7.4: 7.4.9; FortiOS 7.2: 7.2.12; FortiOS 7.0: 7.0.18; FortiOS 6.4: migrate to a fixed release; ….

Temporary workarounds

Disable security fabric access into interface.Only allow legit devices in Wifi Controller > Managed FortiAPsRemove inter-controller-peer elements in config wireless-controller inter-controller configuration
Warning :If auto-auth-extension-device is enabled in config system interface, any devicecan be authorized and then the vulnerability can be exploited without administratorauthorization.Please note that auto-auth-extension-device is disabled by defaultIf inter-controller-peer is set, it is strongly advised to change the inter-controller-key setting, even for fixed versions.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

FortiGuard PSIRT Advisoriesofficial
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://filestore.fortinet.com/fortiguard/rss/ir.xml; this link opens the Fortinet advisory index instead of the raw feed document.
Fortinet
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Fortinet

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2025-53847NVD CVE.org MITRE

Official resources

FortiGate / FortiOS documentation & release notes (target: 7.6 / 7.4 / 7.2)
Release notes
This advisory names 7.6 / 7.4 / 7.2 as the first fixed releases — official upgrade documentation for FortiGate / FortiOS firewalls.
Fortinet Upgrade Path Tool
Official documentation
Official tool to plan a supported FortiOS upgrade path from your current build to the fixed release.
FortiSwitch documentation & upgrade guides
Official documentation
This advisory names 7.6 / 7.4 / 7.2 as the first fixed releases — official upgrade documentation for FortiSwitch.

Discussion(0)

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