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01 Record

CVE-2024-20266

A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of

MediumPUBLISHEDCNA: cisco
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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02 Description

A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.64% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 50.5% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD analysis status
Deferred. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-03-13 16:42Z2 YR AGO
Last updated
2024-08-14 15:00Z2 YR AGO
Reserved
2023-11-08
Assigning CNA
cisco
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
  • CWE-476NULL Pointer DereferenceBase
Data version
5.1
Document digest
dfdcf32c80108627a4b2a61f97346d5ea298673e9fe500f9c2abfa97aacbbb89

05 Affected products

VendorProductVersionsPlatforms
CiscoCisco IOS XR Software5.2.0, 5.2.1, 5.2.2, 5.2.4, 5.2.3, 5.2.5, 5.2.47, 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 6.0.0, 6.0.1, 6.0.2, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.12, 6.1.22, 6.1.32, 6.1.36, 6.1.42, 6.2.1, 6.2.2, 6.2.3, 6.2.25, 6.2.11, 6.3.2, 6.3.3, 6.3.15, 6.4.1, 6.4.2, 6.4.3, 6.5.1, 6.5.2, 6.5.3, 6.5.25, 6.5.26, 6.5.28, 6.5.29, 6.5.32, 6.5.33, 6.6.2, 6.6.3, 6.6.25, 6.6.4, 7.0.1, 7.0.2, 7.0.12, 7.0.14, 7.1.1, 7.1.15, 7.1.2, 7.1.3, 6.7.1, 6.7.2, 6.7.3, 6.7.4, 7.2.0, 7.2.1, 7.2.2, 7.3.1, 7.3.15, 7.3.2, 7.3.3, 7.3.5, 7.4.1, 7.4.2, 6.8.1, 6.8.2, 7.5.1, 7.5.3, 7.5.2, 7.5.4, 7.5.5, 7.6.1, 7.6.2, 7.7.1, 7.7.2, 7.7.21, 6.9.1, 6.9.2, 7.8.1, 7.8.2, 7.9.1, 7.9.2, 7.9.21, 7.10.1, 7.10.2—
ciscoios_xr_software5.2.0, 5.2.1, 5.2.2, 5.2.4, 5.2.3, 5.2.5, 5.2.47, 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 6.0.0, 6.0.1, 6.0.2, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.12, 6.1.22, 6.1.32, 6.1.36, 6.1.42, 6.2.1, 6.2.2, 6.2.3, 6.2.25, 6.2.11, 6.3.2, 6.3.3, 6.3.15, 6.4.1, 6.4.2, 6.4.3, 6.5.1, 6.5.2, 6.5.3, 6.5.25, 6.5.26, 6.5.28, 6.5.29, 6.5.32, 6.5.33, 6.6.2, 6.6.3, 6.6.25, 6.6.4, 7.0.1, 7.0.2, 7.0.12, 7.0.14, 7.1.1, 7.1.15, 7.1.2, 7.1.3, 6.7.1, 6.7.2, 6.7.3, 6.7.4, 7.2.0, 7.2.1, 7.2.2, 7.3.1, 7.3.15, 7.3.2, 7.3.3, 7.3.5, 7.4.1, 7.4.2, 6.8.1, 6.8.2, 7.5.1, 7.5.3, 7.5.2, 7.5.4, 7.5.5, 7.6.1, 7.6.2, 7.7.1, 7.7.2, 7.7.21, 6.9.1, 6.9.2, 7.8.1, 7.8.2, 7.9.1, 7.9.2, 7.9.21, 7.10.1, 7.10.2—

06 References