CVE-2021-1547

What it is

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.

At a glance

Exploitability

Can be exploited over the network with an admin-level account. Limited direct impact.

Exploit odds

1.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-05-22 07:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:32 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.6% in the next 30 days (EPSS).
• Severity: 4.7 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-05-22 07:15 UTC

Last modified

2026-06-17 03:32 UTC

Exploit probability

1.6% · EPSS, next 30 days

Weakness

CWE-77 · Command injection

Record status

Modified

Affected

• Cisco wap125 Firmware ≤ 1.0.3.1
• Cisco wap131 Firmware ≤ 1.0.2.17
• Cisco wap150 Firmware ≤ 1.1.2.4
• Cisco wap351 Firmware ≤ 1.0.2.17
• Cisco wap361 Firmware ≤ 1.1.2.4
• Cisco wap581 Firmware ≤ 1.0.3.1

Attack profile CVSS 3.1 · 4.7

Attack vector

Network

Complexity

Low

Privileges needed

High

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-1547.md and follow it. Check whether this project is affected by CVE-2021-1547. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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