CVE-2025-6542
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 · uneditedAn arbitrary OS command may be executed on the product by a remote unauthenticated attacker.
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 confidenceThis is a critical command injection vulnerability allowing remote unauthenticated attackers to execute arbitrary operating system commands on the affected product. The combination of remote exploitability, no authentication requirement, and full command execution capability makes this extremely severe.
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< 1.3.3= 1.3.3< 1.1.0= 1.1.0< 1.3.1= 1.3.1< 2.2.2= 2.2.2< 2.3.1= 2.3.1< 1.2.1= 1.2.1< 1.2.1= 1.2.1< 2.1.3= 2.1.3CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/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 the TP-Link router modelAccess the router web interface or CLI and locate the device model number (e.g., ER8411, ER7412 M2, ER707 M2, ER7206, ER605, ER706w, ER7212pc)Affected if The device model matches one of the affected models listed in the CVE
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Determine the installed firmware versionIn the router web interface, navigate to System > Firmware or Status page to view the current firmware version. Alternatively, use the CLI command 'show version' or check the firmware file name if accessible.Affected if The installed firmware version cannot be determined or is lower than the fixed versions
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Compare firmware version against affected rangesMatch your installed version to the following vulnerable versions: ER8411 < 1.3.3 or = 1.3.3; ER7412 M2 < 1.1.0 or = 1.1.0; ER707 M2 < 1.3.1 or = 1.3.1; ER7206 < 2.2.2 or = 2.2.2; ER605 < 2.3.1 or = 2.3.1; ER706w < 1.2.1 or = 1.2.1; ER7212pc < 2.1.3 or = 2.1.3Affected if The installed version falls within any of these vulnerable ranges or matches the exact vulnerable version numbers
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Assess network exposure of the deviceVerify whether the router management interface is exposed to the internet or untrusted networks. Check firewall rules, port forwards, and WAN interface accessibility for HTTP/HTTPS management ports (typically 80, 443, 8080).Affected if The router admin interface is reachable from the internet or untrusted networks without VPN or IP restrictions
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Check for indicators of compromiseReview router logs for suspicious commands, unexpected administrative actions, or unknown configuration changes. Monitor for unusual outbound network connections or new user accounts.Affected if Unexpected commands, unfamiliar configurations, or evidence of unauthorized access appears in logs
You are affected if your TP-Link router model matches one of the affected models and your installed firmware version is within the vulnerable ranges listed, especially if the management interface is network-exposed.
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 data1.1.01.2.11.3.1
Apply vendor patches immediately. If no patch is available, isolate the affected system from untrusted networks and implement strict input validation/filtering as a temporary workaround until a fix is available.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-6542 — 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-2025-6542 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
- No spam, self-promotion, credentials, or personal data