Missing Authentication for critical function in CAPWAP daemon
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
CSIRTS triage
- What
- A missing authentication vulnerability allows a local unauthenticated attacker to write device configurations.
- Who is affected
- Local users on the same IP subnet as the affected FortiGate device.
- Urgency
- Remediation is critical due to the potential for unauthorized configuration changes.
- Action
- Apply the necessary updates to FortiOS and FortiSwitchManager.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-125
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-538470.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-53847 | coverage & exploitation status | NVD · CVE.org |
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