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TI-2018-00208 Aliases CVE-2018-0247GHSA-f75h-vqxj-crqh

Improper authentication in Cisco Wireless LAN Controller and Aironet Access Points

Priority LOW 23CWE-287Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

A vulnerability in Web Authentication (WebAuth) clients for the Cisco Wireless LAN Controller (WLC) and Aironet Access Points running Cisco IOS Software could allow an unauthenticated, adjacent attacker to bypass authentication and pass traffic. The vulnerability is due to incorrect implementation of authentication for WebAuth clients in a specific configuration. An attacker could exploit this vulnerability by sending traffic to local network resources without having gone through authentication. A successful exploit could allow the attacker to bypass authentication and pass traffic. This affects Cisco Aironet Access Points running Cisco IOS Software and Cisco Wireless LAN Controller (WLC) releases prior to 8.5.110.0 for the following specific WLC configuration only: (1) The Access Point (AP) is configured in FlexConnect Mode with NAT. (2) The WLAN is configured for central switching, meaning the client is being assigned a unique IP address. (3) The AP is configured with a Split Tunnel access control list (ACL) for access to local network resources, meaning the AP is doing the NAT on the connection. (4) The client is using WebAuth. This vulnerability does not apply to .1x clients in the same configuration. Cisco Bug IDs: CSCvc79502, CSCvf71789.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0091 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Cisco Wireless LAN Controller and Aironet Access PointsCisco Wireless LAN Controller and Aironet Access Points—No fix listedCNA
  • Cisco Wireless LAN Controller and Aironet Access Points Vendor— Affected Cisco Wireless LAN Controller and Aironet Access Points Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:cisco:wireless_lan_controller_software:8.3\(104.105\):*:*:*:*:*:*:*8.3(104.105)VulnerableCisco
cpe:2.3:o:cisco:aironet_access_point_software:8.3\(104.105\):*:*:*:*:*:*:*8.3(104.105)VulnerableCisco
cpe:2.3:o:cisco:aironet_access_point_software:8.5\(107.52\):*:*:*:*:*:*:*8.5(107.52)VulnerableCisco
  • cpe:2.3:o:cisco:wireless_lan_controller_software:8.3\(104.105\):*:*:*:*:*:*:* Versions 8.3(104.105) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:aironet_access_point_software:8.3\(104.105\):*:*:*:*:*:*:* Versions 8.3(104.105) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:aironet_access_point_software:8.5\(107.52\):*:*:*:*:*:*:* Versions 8.5(107.52) Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0247
  2. 2026-10-03 Alias added: GHSA-f75h-vqxj-crqh

References

Advisory 1

  • TI-2018-00197 Improper input validation in Cisco Aironet 1810, 1830, and 1850 Series Access Points CVSS 3.0HIGH 8.6
  • TI-2017-02928 Access control flaw in Cisco Mobility Express 1800 Access Point Series CVSS 3.0CRITICAL 9.8
  • TI-2022-05181 Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2020-03104 Cisco Aironet Access Points UDP Flooding Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2021-01164 Cisco Aironet Access Points FlexConnect Upgrade Information Disclosure Vulnerability CVSS 3.1HIGH 7.5
  • TI-2020-03103 Cisco Aironet Access Point Authentication Flood Denial of Service Vulnerability CVSS 3.1HIGH 8.6
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences