CVE detail

CVE-2021-1439 — CVE-2021-1439

Published 2021-03-24 · Modified 2026-06-17 · Vendor cisco · Product aironet_access_point_software · Source nvd
HIGH
severity
CVSS-derived band
7.4
CVSS v3
0–10 scale
0.0039
EPSS probability
exploitation probability, 30d
32.0%
EPSS percentile
percentile vs all CVEs
NOT LISTED
CISA KEV
known exploited catalog

Description

A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of incoming mDNS traffic. An attacker could exploit this vulnerability by sending a crafted mDNS packet to an affected device through a wireless network that is configured in FlexConnect local switching mode or through a wired network on a configured mDNS VLAN. A successful exploit could allow the attacker to cause the access point (AP) to reboot, resulting in a DoS condition.

Remediation

ProductVulnerable rangeFixed versionAdvisory
Cisco Cisco Aironet Access Point Software (IOS XE Controller)not specifiedadvisory ↗

References

cvedb.io · NVD · CISA KEV · FIRST EPSS · vendor advisories (CVE Program List v5). Informational only, no warranty — verify every remediation against the vendor advisory before acting on it. This product uses data from the NVD API but is not endorsed or certified by the NVD, CISA, FIRST.org or any vendor named. CVE® is a registered trademark of The MITRE Corporation.