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High severity8.6NVD Advisory· Published Mar 24, 2021· Updated Jun 17, 2026

CVE-2021-1373

CVE-2021-1373

Description

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device. The vulnerability is due to insufficient validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

28
  • Cisco Systems, Inc./iOS Xe25 versions
    cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*+ 24 more
    • cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.2.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.3.1:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Cisco IOS XE Wireless Controller Softwarellm-fuzzy
  • Cisco Systems, Inc./Cisco Catalyst 9000 Family Wireless Controllersllm-fuzzy
  • Cisco Systems, Inc./IOS XE Software for Cisco Merakicpe-rescue
    Range: n/a

Patches

Vulnerability mechanics

References

1

News mentions

0

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