How severe is CVE-2005-4257?

CVE-2005-4257 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2005-4257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-4257?

CVE-2005-4257 primarily affects Linksys Befw11s4. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-4257?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2005-4257 published?

CVE-2005-4257 was published on 2005-12-15 and last updated on 2026-06-16.

CVE-2005-4257

CVE-2005-4257 is a high-severity vulnerability in Linksys Befw11s4 with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Linksys Befw11s4
Published: 2005-12-15
Last modified: 2026-06-16

Description

Linksys WRT54GS and BEFW11S4 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 the BID.

Frequently asked questions

What is CVE-2005-4257?: Linksys WRT54GS and BEFW11S4 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 the BID.
How severe is CVE-2005-4257?: CVE-2005-4257 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2005-4257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-4257?: CVE-2005-4257 primarily affects Linksys Befw11s4. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-4257?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-4257 published?: CVE-2005-4257 was published on 2005-12-15 and last updated on 2026-06-16.

References

http://www.securityfocus.com/bid/15861

Affected products (8)

cpe:2.3:h:linksys:befw11s4:1.4.2.7:*:*:*:*:*:*:*
cpe:2.3:h:linksys:befw11s4:1.4.3:*:*:*:*:*:*:*
cpe:2.3:h:linksys:befw11s4:1.43.3:*:*:*:*:*:*:*
cpe:2.3:h:linksys:befw11s4:1.44:*:*:*:*:*:*:*
cpe:2.3:h:linksys:befw11s4_v3:*:*:*:*:*:*:*:*
cpe:2.3:h:linksys:befw11s4_v4:*:*:*:*:*:*:*:*
cpe:2.3:h:linksys:wrt54gs:4.50.6:*:*:*:*:*:*:*
cpe:2.3:h:linksys:wrt54gs:4.70.6:*:*:*:*:*:*:*