TI-2020-02820 Aliases CVE-2020-3260 GHSA-mqfc-mw2x-x89c

Cisco Aironet Series Access Points Client Packet Processing Denial of Service Vulnerability

LOW 29CWE-399Published 2020-04-15 · Updated 2024-11-15

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the improper processing of client packets that are sent to an affected access point (AP). An attacker could exploit this vulnerability by sending a large number of sustained client packets to the affected AP. A successful exploit could allow the attacker to cause the affected AP to crash, resulting in a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00457 39th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Aironet Access Point Software	all versions	—	No fix listed	CNA

Cisco Aironet Access Point Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:aironet_1542i_firmware:8.9\(100.0\):::::::*	8.9(100.0)	Vulnerable	Cisco
cpe:2.3:h:cisco:aironet_1542i:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:aironet_1542d_firmware:8.9\(100.0\):::::::*	8.9(100.0)	Vulnerable	Cisco
cpe:2.3:h:cisco:aironet_1542d:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:aironet_1815_firmware:8.9\(100.0\):::::::*	8.9(100.0)	Vulnerable	Cisco
cpe:2.3:h:cisco:aironet_1815:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:aironet_1830_firmware:8.9\(100.0\):::::::*	8.9(100.0)	Vulnerable	Cisco
cpe:2.3:h:cisco:aironet_1830:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:aironet_1840_firmware:8.9\(100.0\):::::::*	8.9(100.0)	Vulnerable	Cisco
cpe:2.3:h:cisco:aironet_1840:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:aironet_1542i_firmware:8.9\(100.0\):*:*:*:*:*:*:* Versions 8.9(100.0) Vulnerable ·Cisco
cpe:2.3:h:cisco:aironet_1542i:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:aironet_1542d_firmware:8.9\(100.0\):*:*:*:*:*:*:* Versions 8.9(100.0) Vulnerable ·Cisco
cpe:2.3:h:cisco:aironet_1542d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:aironet_1815_firmware:8.9\(100.0\):*:*:*:*:*:*:* Versions 8.9(100.0) Vulnerable ·Cisco
cpe:2.3:h:cisco:aironet_1815:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:aironet_1830_firmware:8.9\(100.0\):*:*:*:*:*:*:* Versions 8.9(100.0) Vulnerable ·Cisco
cpe:2.3:h:cisco:aironet_1830:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:aironet_1840_firmware:8.9\(100.0\):*:*:*:*:*:*:* Versions 8.9(100.0) Vulnerable ·Cisco
cpe:2.3:h:cisco:aironet_1840:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Show 2 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:aironet_1850_firmware:8.9\(100.0\):::::::*	8.9(100.0)	Vulnerable	Cisco
cpe:2.3:h:cisco:aironet_1850:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:aironet_1850_firmware:8.9\(100.0\):*:*:*:*:*:*:* Versions 8.9(100.0) Vulnerable ·Cisco
cpe:2.3:h:cisco:aironet_1850:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-3260
2026-10-03 Alias added: GHSA-mqfc-mw2x-x89c

References

Advisory 1

20200415 Cisco Aironet Series Access Points Client Packet Processing Denial of Service Vulnerability

TI-2021-01146 Cisco Access Points SSH Management Privilege Escalation Vulnerability CVSS 3.1HIGH 7.8
TI-2020-15977 An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. CVSS 3.1MEDIUM 6.5
TI-2020-15976 An issue was discovered in the kernel in NetBSD 7.1. CVSS 3.1MEDIUM 5.3
TI-2020-02821 Cisco Mobility Express Software Cross-Site Request Forgery Vulnerability CVSS 3.1MEDIUM 6.5
TI-2020-15068 The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired… CVSS 3.1LOW 3.5
TI-2022-05287 Cisco Access Points VLAN Bypass from Native VLAN Vulnerability CVSS 3.1MEDIUM 4.7

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences