Cisco Aironet Access Point Authentication Flood Denial of Service Vulnerability
Priority MEDIUM 40CWE-400Published · Updated
Key facts
- Attack vector
- 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-400.
Summary
A vulnerability in Cisco Aironet Access Point (AP) Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper handling of clients that are trying to connect to the AP. An attacker could exploit this vulnerability by sending authentication requests from multiple clients to an affected device. A successful exploit could allow the attacker to cause the affected device to reload.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01404 72nd 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 · 31
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:wireless_lan_controller:*:*:*:*:*:*:*:* | 8.9 to before 8.10.112.0 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:1111-4pwe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1111-8plteeawb:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1111-8pwb:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1113-8plteeawe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1113-8pmwe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1113-8pwe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1116-4plteeawe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1116-4pwe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1117-4plteeawe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:wireless_lan_controller:*:*:*:*:*:*:*:* Versions 8.9 to before 8.10.112.0 Vulnerable ·Cisco
- cpe:2.3:h:cisco:1111-4pwe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1111-8plteeawb:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1111-8pwb:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1113-8plteeawe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1113-8pmwe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1113-8pwe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1116-4plteeawe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1116-4pwe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1117-4plteeawe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 21 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:cisco:1117-4pmlteeawe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1117-4pmwe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:1117-4pwe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:aironet_1815:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:aironet_1830e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:aironet_1830i:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:aironet_1850e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:aironet_1850i:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:business_140ac:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:business_145ac:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:business_240ac:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:a:cisco:business_access_points:*:*:*:*:*:*:*:* | 10.0 to before 10.1.1.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:access_points:*:*:*:*:*:*:*:* | before 16.12.4a | Vulnerable | Cisco |
| cpe:2.3:h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:catalyst_9800-cl:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:catalyst_9800-l-c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:catalyst_9800-l-f:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:a:cisco:aironet_access_point_software:8.5\(151.0\):*:*:*:*:*:*:* | 8.5(151.0) | Vulnerable | Cisco |
| cpe:2.3:a:cisco:aironet_access_point_software:17.2.0.26:*:*:*:*:*:*:* | 17.2.0.26 | Vulnerable | Cisco |
- cpe:2.3:h:cisco:1117-4pmlteeawe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1117-4pmwe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:1117-4pwe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:aironet_1815:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:aironet_1830e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:aironet_1830i:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:aironet_1850e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:aironet_1850i:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:business_140ac:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:business_145ac:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:business_240ac:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:a:cisco:business_access_points:*:*:*:*:*:*:*:* Versions 10.0 to before 10.1.1.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:access_points:*:*:*:*:*:*:*:* Versions before 16.12.4a Vulnerable ·Cisco
- cpe:2.3:h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:catalyst_9800-cl:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:catalyst_9800-l-c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:catalyst_9800-l-f:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:a:cisco:aironet_access_point_software:8.5\(151.0\):*:*:*:*:*:*:* Versions 8.5(151.0) Vulnerable ·Cisco
- cpe:2.3:a:cisco:aironet_access_point_software:17.2.0.26:*:*:*:*:*:*:* Versions 17.2.0.26 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-3559
- 2026-10-03 Alias added: GHSA-mmvp-2hg2-g76c
References
More Cisco Access Points vulnerabilities
- TI-2020-03104 Cisco Aironet Access Points UDP Flooding Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2019-01540 Cisco IOS Access Points Software 802.11r Fast Transition Denial of Service Vulnerability CVSS 3.1HIGH 7.4
- TI-2018-00400 Cisco IOS Access Points Software 802.11r Fast Transition Denial of Service Vulnerability CVSS 3.0HIGH 7.4
- TI-2020-03096 Cisco Aironet Access Points Ethernet Wired Clients Denial of Service Vulnerability CVSS 3.1HIGH 7.4
Sources
- CVE-2020-3559 · CVE Program
- CVE-2020-3559 · NVD
- FIRST EPSS
- GHSA-mmvp-2hg2-g76c · GitHub Advisory Database · CC BY 4.0
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