CVSS 103 sources verified·1 min read
By Lyrie Threat Intelligence·6/16/2026
CRITICAL: CVE-1999-0667 (CVSS 10) — arp protocol arp protocol
CVE: CVE-1999-0667
CVSS: 10 (2.0) — AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: CRITICAL
Status: Critical advisory
Affected
- arp protocol arp protocol
Summary
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.
Verified Sources
References
- https://marc.info/?l=bugtraq&m=87602880019797&w=2
- https://marc.info/?l=bugtraq&m=87602880019797&w=2
_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._
Lyrie Verdict
A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.
Validated sources
- [1]NVD
- [2]GitHub Advisory
- [3]MITRE