ISC DHCP server 4.2 before 4.2.0-P2, when configured to use failover partnerships, allows remote attackers to cause a denial of service (communications-interrupted state and DHCP client service loss) by connecting to a port that is only intended for a failover peer, as demonstrated by a Nagios check_tcp process check to TCP port 520.
Conclusion & alert: CVE-2010-3616 is rated Moderate Risk (49.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.07%, 91th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-02 | 8.43% | 6.07% | -2.37% |
| 2 | 2025-11-02 | 18.09% | 8.43% | -9.66% |
| 3 | 2025-03-30 | — | 18.09% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2010-3616 unimportant priority: Debian including 1 source packages (isc-dhcp), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2010-3616 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2010-3616 |
suse
|
medium | CVE-2010-3616 severity moderate: SUSE including 43 source package names (dhcp-4.2.6-7.3, dhcp-4.3.3-10.14.1, …), 75 product×package rows across 29 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (29 product lines)): Fixed 75. | https://www.suse.com/security/cve/CVE-2010-3616/ |
ubuntu
|
medium | CVE-2010-3616 medium priority: Ubuntu including 1 source packages (isc-dhcp), 6 status rows across 6 suites (dapper, hardy, karmic, lucid, maverick, upstream): DNE 5, released 1. | https://ubuntu.com/security/CVE-2010-3616 |