CVE-2021-1615

Cisco Embedded Wireless Controller Software for Catalyst Access Points Denial of Service Vulnerability

HIGH

8.6

CVSS Score

Published: September 23, 2021 at 02:30 AM UTC

Updated: June 17, 2026 at 03:32 AM UTC

8 products affected across 1 vendorEmbedded Wireless ControllerCatalyst 9130Catalyst 9115

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Severity

HIGH8.6

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

A vulnerability in the packet processing functionality of Cisco Embedded Wireless Controller (EWC) Software for Catalyst Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected AP. This vulnerability is due to insufficient buffer allocation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to exhaust available resources and cause a DoS condition on an affected AP, as well as a DoS condition for client traffic traversing the AP.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Embedded Wireless Controller · Cisco

95%

v ≤ 17.6.1

cisco-catalyst-9105 (environment) · cisco-catalyst-9115 (environment) · cisco-catalyst-9117 (environment) · cisco-catalyst-9120 (environment) · cisco-catalyst-9124 (environment) · cisco-catalyst-9130 (environment)

IOS Xe · Cisco

60%

All versions

Catalyst 9105 · Ciscodevice

80%

All versions

Catalyst 9115 · Ciscodevice

80%

All versions

Catalyst 9117 · Ciscodevice

80%

All versions