CVE-2020-3560

Cisco Aironet Access Points UDP Flooding Denial of Service Vulnerability

HIGH

8.6

CVSS Score

Published: September 24, 2020 at 05:50 PM UTC

Updated: June 17, 2026 at 03:18 AM UTC

49 products affected across 1 vendorWireless LAN Controller SoftwareWireless LAN ControllerAironet Access Point

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Severity

HIGH8.6

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

A vulnerability in Cisco Aironet Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) on an affected device. The vulnerability is due to improper resource management while processing specific packets. An attacker could exploit this vulnerability by sending a series of crafted UDP packets to a specific port on an affected device. A successful exploit could either allow the attacker to tear down the connection between the AP and the wireless LAN controller, resulting in the affected device not being able to process client traffic, or cause the vulnerable device to reload, triggering a DoS condition. After the attack, the affected device should automatically recover its normal functions without manual intervention.

Affected

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

Access Points · Cisco

95%

v < 16.12.4a

Affected range stops below 16.12.4a, so it looks safe — our inference, not a vendor statement

cisco-catalyst-9800-40 (environment) · cisco-catalyst-9800-80 (environment) · cisco-catalyst-9800-cl (environment) · cisco-catalyst-9800-l (environment) · cisco-catalyst-9800-l-c (environment) · cisco-catalyst-9800-l-f (environment)

Aironet Access Point · Cisco

95%

17.1.2.6 17.1.2.9 17.2.0.37 8.10(105.0)8.10(105.4)8.5(154.27)8.8(125.0)

cisco-aironet-1850e (environment) · cisco-aironet-1850i (environment)

Business Wireless Access Point · Cisco

95%

10.0 ≤ v < 10.1.1.0

Affected range stops below 10.1.1.0, so it looks safe — our inference, not a vendor statement

Wireless LAN Controller · Cisco

95%

8.9 ≤ v < 8.10.112.0

Affected range stops below 8.10.112.0, so it looks safe — our inference, not a vendor statement

cisco-1111-4pwe (environment) · cisco-1111-8plteeawb (environment) · cisco-1111-8pwb (environment) · cisco-1113-8plteeawe (environment) · cisco-1113-8pmwe (environment) · cisco-1113-8pwe (environment) · cisco-1116-4plteeawe (environment) · cisco-1116-4pwe (environment) · cisco-1117-4plteeawe (environment) · cisco-1117-4pmlteeawe (environment) · cisco-1117-4pmwe (environment) · cisco-1117-4pwe (environment) · cisco-aironet-1542d (environment) · cisco-aironet-1542i (environment) · cisco-aironet-1562d (environment) · cisco-aironet-1562e (environment) · cisco-aironet-1562i (environment) · cisco-aironet-1815 (environment) · cisco-aironet-1830e (environment) · cisco-aironet-1830i (environment) · cisco-aironet-1850e (environment) · cisco-aironet-1850i (environment) · cisco-aironet-2800e (environment) · cisco-aironet-2800i (environment) · cisco-aironet-3800e (environment) · cisco-aironet-3800i (environment) · cisco-aironet-3800p (environment) · cisco-aironet-4800 (environment) · cisco-business-140ac (environment) · cisco-business-145ac (environment) · cisco-business-240ac (environment) · cisco-catalyst-9105 (environment) · cisco-catalyst-9115 (environment) · cisco-catalyst-9117 (environment) · cisco-catalyst-9120 (environment) · cisco-catalyst-9130 (environment) · cisco-catalyst-iw6300 (environment) · cisco-esw-6300-con-x-k9 (environment)

Wireless LAN Controller Software · Cisco

95%

v < 8.5.161.08.6 ≤ v < 8.8.130.0

Affected range stops below 8.5.161.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.8.130.0, so it looks safe — our inference, not a vendor statement

1111-4Pwe · Ciscodevice

80%

All versions

1111-8Plteeawb · Ciscodevice

80%

All versions

1111-8Pwb · Ciscodevice