CVE-2024-20446: cisco cisco nx-os software NULL Pointer Dereference
Vulnerability summary
CVE-2024-20446 is a high (CVSS 8.6) NULL Pointer Dereference vulnerability in cisco cisco nx-os software. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55.2% of scored vulnerabilities.
Timeline
- 28-08-2024PublishedVulnerability first disclosed.
- 28-08-2024Last modifiedVulnerability information updated.
Description
A vulnerability in the DHCPv6 relay agent of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST8.6HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
0.78%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
0.00 pp
From 0.78% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Cisco1 product
- cisco nx-os software10.2(1) | 10.2(1q) | 9.3(9) | 8.2(11)
1 vendor · 1 product