CVE-2005-4276: Westell Versalink 327W allows remote attackers to cause a denial of service (device crash) via an IP packet wi

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HIGH 7.8MITIGATE

CVE-2005-4276 is a high-severity flaw (CVSS 7.8) affecting versalink. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Westell Versalink 327W allows remote attackers to cause a denial of service (device crash) via an IP packet with the same source and destination IPs and ports, and with the SYN flag set (aka LanD). NOTE: the provenance of this issue is unknown; the details are obtained solely from third party information.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Published	2005-12-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: westell

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-12-16 11:03 UTCPublished CVE record published
2026-06-16 22:18 UTCUpdated Record last modified

westell versalink MITIGATE

Affected: 327w

Fixed in: no fixed release known

Safe to downgrade to: a release before 327w

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Westell Versalink 327W - LanD Packet Denial of Service

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2005-4276?

versalink: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-4276 being exploited?

CVE-2005-4276 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2005-4276 affect?

CVE-2005-4276 affects versalink. Severity is high (CVSS 7.8). Westell Versalink 327W allows remote attackers to cause a denial of service (device crash) via an IP packet with the same source and destination IPs and ports, and with the SYN flag set (aka LanD). NOTE: the provenance of this issue is unkn

How urgent is CVE-2005-4276?

Priority 53/100. High severity; Public exploit reference

References

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