Riskcovery

CVE-2026-20038

Cisco Nexus 9000 Series Fabric Switches in ACI Mode Policy-Based Redirect Endpoint Group Contract Bypass Vulnerability

State
Published
Severity
5.8 Medium
Published
Oct 7, 2026
Updated
Oct 7, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

Description

A vulnerability in the endpoint group (EPG) contract functionality of Cisco Nexus 9000 Series Fabric Switches in ACI Mode could allow an unauthenticated, remote attacker to bypass configured EPG contracts.

This vulnerability is due to an improper control with EPG contracts. An attacker could exploit this vulnerability by sending IPv4 or IPv6 packets using UDP source and destination ports that are assigned to DHCP traffic through an affected device. A successful exploit could allow the attacker to bypass EPG contracts on the affected device.

Scores

CVSSScoreVectorSource
3.15.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Ncisco

Weaknesses

Affected Products

ProductVersions
Cisco NX-OS System Software in ACI ModeCisco
  • 15.2(1g)Affected
  • 15.2(2e)Affected
  • 15.2(2f)Affected
  • 15.2(2g)Affected
  • 15.2(2h)Affected
  • 15.2(3f)Affected
  • 15.2(3e)Affected
  • 15.2(3g)Affected
  • 15.2(4d)Affected
  • 15.2(4e)Affected
  • 15.2(5c)Affected
  • 15.2(5d)Affected
  • 16.0(1g)Affected
  • 15.2(5e)Affected
  • 15.2(4f)Affected
  • 15.2(6e)Affected
  • 15.2(6h)Affected
  • 16.0(1j)Affected
  • 15.2(6g)Affected
  • 15.2(7f)Affected
  • 15.2(7g)Affected
  • 16.0(2h)Affected
  • 15.2(8d)Affected
  • 16.0(2j)Affected
  • 15.2(8e)Affected
  • and 36 more versions

References

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