Wap125 FirmwareOperating system · Cisco
CVE-2021-1551
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMultiple 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceCommand injection vulnerability in Cisco Small Business 100, 300, and 500 Series Wireless Access Points web-based management interface. The flaw stems from improper validation of user-supplied input in HTTP requests, allowing authenticated administrators to inject and execute arbitrary commands with root privileges on the underlying Linux-based firmware.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Wap125 FirmwareOperating system
<= 1.0.3.1
Wap131 FirmwareOperating system
<= 1.0.2.17
Wap150 FirmwareOperating system
<= 1.1.2.4
Wap351 FirmwareOperating system
<= 1.0.2.17
Wap361 FirmwareOperating system
<= 1.1.2.4
Wap581 FirmwareOperating system
<= 1.0.3.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the Cisco WAP modelAccess the device's web management interface or check the device label to confirm the exact model number (WAP125, WAP131, WAP150, WAP351, WAP361, or WAP581)Affected if The device is not one of these six models, then the CVE does not apply to this device
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Check the installed firmware versionLog into the web management interface and navigate to the Status or Administration section to view the current firmware version. Alternatively, use the device's CLI if available.Affected if The firmware version is greater than 1.0.3.1 for WAP125/WAP581, greater than 1.0.2.17 for WAP131/WAP351, or greater than 1.1.2.4 for WAP150/WAP361, then the device is not in the affected version range. Otherwise, it is potentially affected.
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Confirm the web-based management interface is enabledCheck the device configuration to verify that the HTTP or HTTPS web management interface is turned on. This is typically found under Administration or Access Control settings.Affected if The web management interface is disabled and only CLI or other access methods are used, the attack surface is reduced but the device remains vulnerable if the interface is re-enabled.
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Verify administrative account accessReview the list of administrator accounts configured on the device through the web interface under Administration or User Management.Affected if There are any administrator accounts configured, an attacker who compromises one of these accounts could exploit the command injection flaw. Restrict administrative access to trusted users only.
If the device is a WAP125, WAP131, WAP150, WAP351, WAP361, or WAP581 running firmware at or below the affected version listed and the web management interface is enabled with administrator accounts present, the environment is potentially affected by this command injection vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the vendor-supplied firmware patch from Cisco when available. Until patched, limit administrative access to the web interface to trusted personnel only and monitor for suspicious HTTP activity.
Fix this in Wap125 Firmware
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-1551 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-1551 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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