How severe is CVE-2010-2156?

CVE-2010-2156 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2010-2156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 76% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-2156?

CVE-2010-2156 primarily affects Isc Dhcp. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-2156?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-2156 published?

CVE-2010-2156 was published on 2010-06-07 and last updated on 2026-06-16.

CVE-2010-2156

CVE-2010-2156 is a medium-severity vulnerability in Isc Dhcp with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 76% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 76% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Isc Dhcp
Published: 2010-06-07
Last modified: 2026-06-16

Description

ISC DHCP 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1 allows remote attackers to cause a denial of service (server exit) via a zero-length client ID.

Frequently asked questions

What is CVE-2010-2156?: ISC DHCP 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1 allows remote attackers to cause a denial of service (server exit) via a zero-length client ID.
How severe is CVE-2010-2156?: CVE-2010-2156 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2010-2156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 76% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-2156?: CVE-2010-2156 primarily affects Isc Dhcp. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-2156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-2156 published?: CVE-2010-2156 was published on 2010-06-07 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:a:isc:dhcp:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1.1:b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1.1:b2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1.1:b3:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1.1:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.1:b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.1:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.2:b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.2:b2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.2:b3:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.0.2:rc1:*:*:*:*:*:*

More vulnerabilities in Isc Dhcp

CVE-2009-0692 — Critical (CVSS 10.0): Stack-based buffer overflow in the script_write_params method in client/dhclient.c in ISC DHCP dhclient 4.1 before…
CVE-2011-2749 — High (CVSS 7.8): The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote…
CVE-2011-2748 — High (CVSS 7.8): The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote…
CVE-2011-0413 — High (CVSS 7.8): The DHCPv6 server in ISC DHCP 4.0.x and 4.1.x before 4.1.2-P1, 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, and 4.2.x before…
CVE-2018-5732 — High (CVSS 7.5): Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity…
CVE-2018-5733 — High (CVSS 7.5): A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can…

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