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TI-2019-01423 Aliases CVE-2019-1799GHSA-9rrr-fcv6-2wgf

Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service Vulnerabilities

Priority LOW 30CWE-399Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the handling of Inter-Access Point Protocol (IAPP) messages by Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability exist because the software improperly validates input on fields within IAPP messages. An attacker could exploit the vulnerability by sending malicious IAPP messages to an affected device. A successful exploit could allow the attacker to cause the Cisco WLC Software to reload, resulting in a DoS condition. Software versions prior to 8.2.170.0, 8.5.150.0, and 8.8.100.0 are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00646 51st percentileScored 2026-11-07
Fix Fixed Cisco Wireless LAN Controller (WLC) (Cisco): 8.2.170.0, 8.3.150.0, 8.8.100.0

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
CiscoCisco Wireless LAN Controller (WLC)before 8.2.170.0; before 8.3.150.0; before 8.8.100.08.2.170.0, 8.3.150.0, 8.8.100.0Patch availableCNA
  • Cisco Wireless LAN Controller (WLC) VendorCisco Affected before 8.2.170.0; before 8.3.150.0; before 8.8.100.0 Fixed in 8.2.170.0, 8.3.150.0, 8.8.100.0 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:cisco:wireless_lan_controller:*:*:*:*:*:*:*:*before 8.2.170.0VulnerableCisco
cpe:2.3:o:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*8.3.143.0 to before 8.3.150.0; 8.5.103.0 to before 8.5.131.0; 8.6.101.0 to before 8.8.100.0VulnerableCisco
  • cpe:2.3:a:cisco:wireless_lan_controller:*:*:*:*:*:*:*:* Versions before 8.2.170.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:* Versions 8.3.143.0 to before 8.3.150.0; 8.5.103.0 to before 8.5.131.0; 8.6.101.0 to before 8.8.100.0 Vulnerable ·Cisco

Remediation

  • Fix · CNA Cisco Wireless LAN Controller (WLC) (Cisco) Fixed in 8.2.170.0, 8.3.150.0, 8.8.100.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Cisco Wireless LAN Controller (WLC) — 20190417 Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service Vulnerabilities

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2019-01420 Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service VulnerabilitiesPriority LOW 30
    • TI-2019-01424 Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service VulnerabilitiesPriority LOW 29
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-1799
  2. 2026-10-03 Alias added: GHSA-9rrr-fcv6-2wgf
  3. 2026-10-20 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2014-00660 Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS… CVSS 2.0HIGH 10.0
  • TI-2020-03104 Cisco Aironet Access Points UDP Flooding Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2018-00376 Cisco Wireless LAN Controller Software GUI Privilege Escalation Vulnerability CVSS 3.1HIGH 7.8
  • TI-2020-03103 Cisco Aironet Access Point Authentication Flood Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2014-00664 Cisco Wireless LAN Controller (WLC) devices 7.2, 7.3, and 7.4 before 7.4.110.0 allow… CVSS 2.0HIGH 7.8
  • TI-2014-00663 Cisco Wireless LAN Controller (WLC) devices 7.2 before 7.2.115.2, 7.3, and 7.4 before… CVSS 2.0HIGH 7.8
See all 25 →

Sources

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