CVE-2025-4448
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 · uneditedA vulnerability classified as critical was found in D-Link DIR-619L 2.04B04. This vulnerability affects the function formEasySetupWizard. The manipulation of the argument curTime leads to buffer overflow. The attack can be initiated remotely. The vendor was contacted early about this disclosure. This vulnerability only affects products that are no longer supported by the maintainer.
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 confidenceA critical buffer overflow vulnerability exists in D-Link DIR-619L firmware version 2.04B04 within the formEasySetupWizard function. The curTime parameter is not properly validated before use in a memory operation, allowing an attacker to overflow a buffer by supplying an overly long string. This can be exploited remotely without authentication, potentially allowing arbitrary code execution.
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= 2.04b04CVSS 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 device modelLog into the router web interface (typically 192.168.0.1) and check the status page, or physically inspect the device label for the model number DIR-619LAffected if The device model is not D-Link DIR-619L, then this specific CVE does not apply
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Check the installed firmware versionIn the router web interface, navigate to the Status or Maintenance section to view the firmware version. Compare against the affected version 2.04B04Affected if The firmware version is exactly 2.04B04, indicating the vulnerable version is installed
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Verify web interface accessibilityDetermine if the router HTTP/HTTPS management interface is reachable from untrusted networks by reviewing firewall rules or network configurationAffected if The router web interface is directly exposed to the internet or untrusted networks, making remote exploitation possible
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Confirm the vulnerable function existsIf you have telnet or SSH access, examine the firmware binary or web server configuration for the formEasySetupWizard function handling the curTime parameterAffected if The formEasySetupWizard function with vulnerable curTime parameter handling is present in the firmware
You are affected if you have a D-Link DIR-619L router running firmware version 2.04B04 with its web interface accessible to the network where the vulnerability could be exploited.
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.
dbcve · scopedSince this product is end-of-life and unsupported with no available patch, immediate mitigation requires network isolation (placing device behind a firewall with no direct internet exposure), disabling the vulnerable service if possible, and replacing the unsupported hardware with a currently maintained device.
- 1. Isolate the affected device from untrusted networks using firewall rules or network segmentation.
- 2. Disable remote management/administration interfaces if not required, limiting access to local network only.
- 3. Monitor network traffic to and from the device for signs of exploitation attempts.
- 4. Consider replacing the end-of-life D-Link DIR-619L with a currently supported router from a vendor that provides regular security updates.
- 5. If continued use is unavoidable, implement strict access control lists (ACLs) to limit which IP addresses can access the device's management interface.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing4.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-4448 — 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-2025-4448 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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- Version or environment caveats, and links to real fixes
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