CVE-2024-45885
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 · uneditedDrayTek Vigor3900 1.5.1.3 contains a post-authentication command injection vulnerability. This vulnerability occurs when the `action` parameter in `cgi-bin/mainfunction.cgi` is set to `autodiscovery_clear.`
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 confidenceDrayTek Vigor3900 version 1.5.1.3 contains a post-authentication command injection vulnerability in the cgi-bin/mainfunction.cgi script. When the action parameter is set to autodiscovery_clear, the application fails to properly sanitize user input before passing it to system command execution, allowing authenticated attackers to inject and execute arbitrary operating system commands.
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= 1.5.1.3CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:L/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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Confirm DrayTek Vigor3900 modelIdentify the device model through web interface login page, system status page, or physical device label. Look for Vigor3900 specifically.Affected if The device is a DrayTek Vigor3900 unit
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Check firmware versionAccess the device web interface and navigate to System Status or Firmware Upgrade page to view the installed firmware version. Alternatively, check via CLI if available.Affected if Firmware version is exactly 1.5.1.3
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Verify web management interface accessibilityAttempt to access the device cgi-bin/mainfunction.cgi endpoint via HTTP/HTTPS from your network. This is the script where the vulnerability exists.Affected if The web interface and cgi-bin/mainfunction.cgi are reachable from your network
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Confirm administrative access is enabledCheck if the device has administrative accounts configured and whether the web management interface accepts authentication. This is a post-authentication vulnerability, so valid admin credentials are required for exploitation.Affected if Administrative authentication is enabled and valid credentials exist for the device
You are affected if you have a DrayTek Vigor3900 device running firmware version 1.5.1.3 with its web management interface accessible and administrative authentication enabled.
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 dataRestrict administrative access to trusted IP addresses and users, enforce strong credential policies, and apply vendor security patches when available. Network segmentation can also limit exposure since exploitation requires valid authentication.
- Consultation3.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-45885 — 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-2024-45885 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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