CVE-2021-34740: high-severity vulnerability in Cisco Aironet Access Point Software
Cisco Aironet Access Points WLAN Control Protocol Packet Buffer Leak Denial of Service Vulnerability
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.4epss 0.4%
A vulnerability in the WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of the affected device.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected products
Cisco · Cisco Aironet Access Point SoftwareRelated CVEs — Cisco Aironet Access Point Software
In the same product, most dangerous first.
CVE-2019-15260CRITICALCisco Aironet Access Points Unauthorized Access VulnerabilityEPSS 3.0%CVE-2021-1437HIGHCisco Aironet Access Points FlexConnect Upgrade Information Disclosure VulnerabilityEPSS 1.5%CVE-2020-3262HIGHCisco Wireless LAN Controller CAPWAP Denial of Service VulnerabilityEPSS 1.5%CVE-2020-3560HIGHCisco Aironet Access Points UDP Flooding Denial of Service VulnerabilityEPSS 1.4%CVE-2020-3559MEDIUMCisco Aironet Access Point Authentication Flood Denial of Service VulnerabilityEPSS 1.4%CVE-2022-20622HIGHCisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service VulnerabilityEPSS 1.4%