CVE-1999-0667

CVE-1999-0667 is a critical-severity vulnerability in Arp Protocol with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

The ARP protocol allows any host to spoof ARP replies and poison the ARP cache to conduct IP address spoofing or a denial of service.

Frequently asked questions

What is CVE-1999-0667?
The ARP protocol allows any host to spoof ARP replies and poison the ARP cache to conduct IP address spoofing or a denial of service.
How severe is CVE-1999-0667?
CVE-1999-0667 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0667 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0667?
CVE-1999-0667 affects Arp Protocol. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0667?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-0667 published?
CVE-1999-0667 was published on 1997-09-19 and last updated on 2026-06-16.

References

Affected products (1)