CVE-2012-3955

CVE-2012-3955 is a high-severity vulnerability in Isc Dhcp with a CVSS 2.0 base score of 7.1. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.

Frequently asked questions

What is CVE-2012-3955?
ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.
How severe is CVE-2012-3955?
CVE-2012-3955 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2012-3955 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3955?
CVE-2012-3955 primarily affects Isc Dhcp. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-3955?
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-2012-3955 published?
CVE-2012-3955 was published on 2012-09-14 and last updated on 2026-06-16.

References

Affected products (31)

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