Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco Small Business wireless access points and could let someone with administrator credentials run operating-system commands on the device. The business risk is unauthorized control of network infrastructure, but urgency is reduced because exploitation requires valid admin access.
Executive priority
Treat this as a targeted infrastructure hardening item, not an internet-wide emergency based on the supplied evidence. Prioritize sites where management interfaces are broadly reachable or admin credential hygiene is weak.
Technical view
CVE-2021-1552 is a CWE-77 command injection issue in the web-based management interface. Improper validation of user input allows crafted HTTP requests from an authenticated remote administrator to execute arbitrary commands with root privileges on an affected access point.
Likely exposure
Exposure is most likely where Cisco Small Business 100, 300, or 500 Series wireless access points are still deployed and their web management interface is reachable to administrators or management networks.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires valid administrative credentials, network access to the web management interface, no user interaction, and low attack complexity.
Researcher notes
The bundle identifies the vulnerability class, privilege requirement, and root command execution impact, but does not include detailed model or fixed-version data. Use Cisco's advisory as the authoritative source before confirming exposure or closure.
Mitigation direction
- Check Cisco's advisory for affected models, fixed software, and supported remediation.
- Restrict web management access to trusted administrative networks only.
- Review and minimize administrator accounts on affected access points.
- Prioritize replacement if devices are unsupported or cannot receive vendor fixes.
Validation and detection
- Inventory Cisco Small Business 100, 300, and 500 Series wireless access points.
- Compare device software and model details against Cisco's advisory.
- Verify web management is not exposed beyond trusted administration paths.
- Audit administrator accounts for unauthorized, stale, or shared credentials.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-1552 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
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L1.23.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20210519 Cisco Small Business 100, 300, and 500 Series Wireless Access Points Command Injection VulnerabilitiesCVE 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.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
