Security readout for executives and security teams
Plain-English summary
CVE-2020-3559 is a denial-of-service issue in Cisco Aironet Access Point Software. An unauthenticated attacker could send authentication requests from multiple clients and cause an affected access point to reload, disrupting wireless service. The sources describe availability impact, not data theft or privilege escalation.
Executive priority
Handle through normal vulnerability management unless affected APs support critical operations. Escalate priority where a wireless outage would disrupt revenue, safety, or incident response workflows.
Technical view
The flaw is improper handling of clients attempting to connect to the AP, mapped to CWE-400 resource consumption. Cisco and CVE describe unauthenticated remote exploitation with high attack complexity and high availability impact. CVSS v3.0 is 6.8, with no confidentiality or integrity impact listed.
Likely exposure
Exposure is limited to organizations running affected Cisco Aironet Access Point Software. The bundle does not provide exact affected versions, CPEs, or fixed-release details, so teams must validate installed AP software against Cisco’s advisory rather than infer coverage.
Exploitation context
The bundle does not indicate known active exploitation, and CISA KEV is false. Exploitation requires sending authentication requests from multiple clients to an affected AP. Treat this primarily as a wireless availability and site resilience risk.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory reference. No exploit code, active exploitation, affected-version list, or fixed-release table is included in the supplied bundle. Avoid broad product claims beyond Cisco Aironet Access Point Software.
Mitigation direction
- Review Cisco’s advisory for affected releases and remediation guidance.
- Upgrade or apply Cisco-recommended fixes where available.
- Prioritize APs supporting critical offices, guest networks, and high-density areas.
- Monitor for unexpected AP reloads during client authentication spikes.
Validation and detection
- Inventory Cisco Aironet APs and their software versions.
- Compare installed versions against Cisco’s advisory and CVE record.
- Review AP logs for reloads linked to client connection attempts.
- Confirm remediated APs no longer run affected software.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-3559 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H2.24Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200924 Cisco Aironet Access Point Authentication Flood Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.