Multiple vulnerabilities in the web-based management interface of certain Cisco Small Business 100, 300, and 500 Series Wireless Access Points could allow an authenticated, remote attacker to perform command injection attacks against an affected device. These vulnerabilities are due to improper validation of user-supplied input. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to the web-based management interface of an affected system. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the device. To exploit these vulnerabilities, the attacker must have valid administrative credentials for the device.
Conclusion & alert: CVE-2021-1554 is rated Moderate Risk (45/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.58%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.60% | 1.58% | +0.98% |
| 2 | 2026-05-24 | 0.74% | 0.60% | -0.14% |
| 3 | 2025-11-21 | — | 0.74% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.7 | 3.1 | MEDIUM |
|
1.2 | 3.4 | [email protected] |
| 7.2 | 3.1 | HIGH |
|
1.2 | 5.9 | [email protected] |
| 9.0 | 2.0 | HIGH |
|
8.0 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cisco | wap125_firmware | <= 1.0.3.1 | cpe:2.3:o:cisco:wap125_firmware:*:*:*:*:*:*:*:* |
| cisco | wap131_firmware | <= 1.0.2.17 | cpe:2.3:o:cisco:wap131_firmware:*:*:*:*:*:*:*:* |
| cisco | wap150_firmware | <= 1.1.2.4 | cpe:2.3:o:cisco:wap150_firmware:*:*:*:*:*:*:*:* |
| cisco | wap351_firmware | <= 1.0.2.17 | cpe:2.3:o:cisco:wap351_firmware:*:*:*:*:*:*:*:* |
| cisco | wap361_firmware | <= 1.1.2.4 | cpe:2.3:o:cisco:wap361_firmware:*:*:*:*:*:*:*:* |
| cisco | wap581_firmware | <= 1.0.3.1 | cpe:2.3:o:cisco:wap581_firmware:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-wap-inject-Mp9FSdG | Vendor Advisory |