CVE-2021-41552
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 · uneditedCommScope SURFboard SBG6950AC2 9.1.103AA23 devices allow Command Injection.
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 · moderate confidenceCommand injection vulnerability in CommScope SURFboard SBG6950AC2 firmware version 9.1.103AA23 allows remote attackers to execute arbitrary operating system commands on the affected device, likely through unsanitized user input in a web interface parameter or API endpoint.
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= 9.1.103aa23all versionsall versionsall versionsall versionsCVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/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 device modelAccess the device web administration interface or check device label/marketing materials to confirm the exact SURFboard model number (SBG6950AC2, SBG7400AC2, SBG7580AC, SBG7600AC2, or SBG10)Affected if Device model is any of: SBG6950AC2, SBG7400AC2, SBG7580AC, SBG7600AC2, or SBG10
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Check firmware versionLog into the device web interface and navigate to the status or system information page to view the installed firmware version; alternatively, check the admin interface HTML source or the firmware file if obtainableAffected if Firmware version is 9.1.103AA23 (for SBG6950AC2) OR any version on SBG7400AC2, SBG7580AC, SBG7600AC2, or SBG10 (these are affected at all versions)
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Verify web management interface accessibilityAttempt to access the device admin interface over HTTP/HTTPS from an external network perspective; check if port 80, 443, or the custom admin port is listening and reachable from untrusted networksAffected if The administrative web interface is exposed to untrusted networks (not behind a firewall or VPN)
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Check for command injection entry pointsInspect the web interface forms and API endpoints for parameters that may accept user input and are passed to system calls; this may require access to the firmware or a test of the interface with controlled inputAffected if Web interface parameters accept unsanitized input that could be interpreted as OS commands (requires manual testing or firmware analysis to confirm)
User is affected if they own any of the listed SURFboard models (SBG6950AC2 at version 9.1.103AA23, or SBG7400AC2/SBG7580AC/SBG7600AC2/SBG10 at any version) and the device web admin interface is network-accessible.
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 available firmware update from CommScope; if no patch exists, consider network isolation or device replacement, and restrict administrative interface access to trusted networks.
- 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-2021-41552 — 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-2021-41552 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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- 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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