CVE-2020-29655
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 injection vulnerability exists in RT-AC88U Download Master before 3.1.0.108. Accessing Main_Login.asp?flag=1&productname=FOOBAR&url=/downloadmaster/task.asp will redirect to the login site, which will show the value of the parameter productname within the title. An attacker might be able to influence the appearance of the login page, aka text 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 confidenceA reflected text injection vulnerability in ASUS RT-AC88U Download Master allows the productname URL parameter to be directly reflected into the login page's HTML title without sanitization. An attacker can craft a malicious URL with arbitrary text in the productname parameter to influence the login page's appearance.
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< 3.1.0.108CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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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Confirm device modelAccess the router admin interface or check the device label to verify the model is ASUS RT-AC88UAffected if Device is not an ASUS RT-AC88U (not affected)
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Check Download Master versionNavigate to the Download Master page in the router firmware (typically under USB application or Download Master settings) and locate the firmware version numberAffected if Version is 3.1.0.108 or higher (not affected); version is below 3.1.0.108 (potentially affected)
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Verify Download Master interface is accessibleAttempt to access the Download Master web interface over HTTP/HTTPS on the local network (commonly on port 8081 or as a subsection of the main router interface)Affected if Download Master interface is not exposed or accessible (not affected)
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Test for reflected parameter injectionCraft a URL to the Download Master login page with a test productname parameter value, for example: http://<router-ip>/downloadmaster?productname=TESTINJECTION and examine if the submitted value appears unsanitized in the page title or HTMLAffected if The productname parameter value is reflected directly in the HTML without encoding or sanitization (vulnerable)
You are affected if your device is an ASUS RT-AC88U running Download Master firmware version below 3.1.0.108 AND the Download Master web interface is accessible on your network.
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 data3.1.0.108
Update Download Master to version 3.1.0.108 or later, which contains proper input validation for the productname parameter. If immediate patching is not feasible, restrict network access to the Download Master interface.
- Consultation2.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2020-29655 — 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-2020-29655 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
- No spam, self-promotion, credentials, or personal data