Full Report
WatchGuard security advisory (AV26-972)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in WatchGuard Access Points (AP)
## CVE Details
- **CVE ID:** CVE-2026-101891, CVE-2026-86102, CVE-2026-87969
- **CVSS Score:** Not explicitly provided in source (Estimated Critical/High based on impact)
- **CWE:** CWE-284 (Improper Access Control), CWE-77 (Command Injection)
## Affected Systems
- **Products:** WatchGuard Access Points (AP)
- **Versions:** All versions prior to v3.4.8
- **Configurations:** Systems running the API service or diagnostic CLI accessible to the network.
## Vulnerability Description
Three distinct vulnerabilities have been identified in WatchGuard AP firmware:
1. **CVE-2026-101891:** An improper access control flaw in the API service. This allows an unauthenticated actor to bypass security restrictions and interact with the service.
2. **CVE-2026-86102:** A command injection flaw within the internal management API. This could allow an attacker to execute arbitrary commands on the underlying operating system.
3. **CVE-2026-87969:** A command injection vulnerability in the Diagnostic Command Line Interface (CLI). This flaw requires authentication but allows a user with CLI access to escalate privileges or execute unauthorized commands.
## Exploitation
- **Status:** Not specified (Assume PoC internal/private given the advisory date)
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Potential for full system data access)
- **Integrity:** High (Unauthorized command execution and system modification)
- **Availability:** High (Potential for system takeover or service disruption)
## Remediation
### Patches
- **Update to WatchGuard AP firmware version 3.4.8 or later.** Administrators should deploy these updates via the WatchGuard Wi-Fi Cloud or the Gateway Wireless Controller.
### Workarounds
- **Network Segmentation:** Ensure management interfaces and APIs are restricted to trusted administrative VLANs only.
- **Access Control:** Disable unused management services (HTTP/HTTPS/SSH) on the wireless interface where possible.
## Detection
- **Indicators of Compromise:** Monitor for unusual administrative login attempts or API calls originating from unauthorized internal IP addresses.
- **Log Analysis:** Review system logs for command execution patterns within the Diagnostic CLI or unexpected API responses.
## References
- WatchGuard PSIRT Advisory CVE-2026-101891: hxxps[://]psirt[.]watchguard[.]com/CVE-2026-101891
- WatchGuard PSIRT Advisory CVE-2026-86102: hxxps[://]psirt[.]watchguard[.]com/CVE-2026-86102
- WatchGuard PSIRT Advisory CVE-2026-87969: hxxps[://]psirt[.]watchguard[.]com/CVE-2026-87969
- WatchGuard Security Advisories Main Page: hxxps[://]psirt[.]watchguard[.]com/