Cisco Aironet Access Points Ethernet Wired Clients Denial of Service Vulnerability
A vulnerability in the Ethernet packet handling of Cisco Aironet Access Points (APs) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by connecting as a wired client to the Ethernet interface of an affected device and sending a series of specific packets within a short time frame. A successful exploit could allow the attacker to cause a NULL pointer access that results in a reload of the affected device.
- Published
- Sep 24, 2020
- Updated
- Jun 16, 2026
- EPSS
- 0.5% · 39th percentile
- CWE
- CWE-476
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Report tools
Action score
29
Monitor
Low priority for now.
- CVSS
- 29 / 40 · 7.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.4
- CNA · cisco
- 7.4
- agree
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | aironet 1850e | cpe:2.3:h:cisco:aironet_1850e |
| cisco | wireless lan controller | cpe:2.3:o:cisco:wireless_lan_controller |
| cisco | aironet 1542d | cpe:2.3:h:cisco:aironet_1542d |
| cisco | aironet 1542i | cpe:2.3:h:cisco:aironet_1542i |
| cisco | aironet 1562d | cpe:2.3:h:cisco:aironet_1562d |
| cisco | aironet 1562e | cpe:2.3:h:cisco:aironet_1562e |
| cisco | aironet 1562i | cpe:2.3:h:cisco:aironet_1562i |
| cisco | aironet 1810 | cpe:2.3:h:cisco:aironet_1810 |
| cisco | aironet 1815 | cpe:2.3:h:cisco:aironet_1815 |
| cisco | aironet 1830e | cpe:2.3:h:cisco:aironet_1830e |
| cisco | aironet 1830i | cpe:2.3:h:cisco:aironet_1830i |
| cisco | aironet 1840 | cpe:2.3:h:cisco:aironet_1840 |
and 16 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco access pointsbefore 16.12.4a
- cisco aironet access point software8.10(1.255)
- cisco business access points10.0 and later · before 10.1.1.0
- cisco wireless lan controller8.6 and later · before 8.10.105.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.
Cisco Cisco Aironet Access Point Software
- n/aaffected
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-3560Cisco Aironet Access Points UDP Flooding Denial of Service Vulnerability34Monitor
- CVE-2020-3559Cisco Aironet Access Point Authentication Flood Denial of Service Vulnerability34Monitor
- CVE-2015-0622The Wireless Intrusion Detection (aka WIDS) functionality on Cisco Wireless LAN Controller (WLC) devices allows remote attackers to cause a 28Monitor
- CVE-2013-6684The web framework on Cisco Wireless LAN Controller (WLC) devices does not properly validate configuration parameters, which allows remote au27Monitor
- CVE-2019-1800Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service Vulnerabilities26Monitor
- CVE-2019-1799Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service Vulnerabilities26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone on the same network segment can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.