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CVE-2026-20038

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Cisco / Cisco NX-OS System Software in ACI Modeaffected 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 16.0(3d); affected 16.0(3e); affected 15.2(8f); affected 15.2(8g); affected 15.3(1d); affected 15.2(8h); affected 16.0(4c); affected 15.3(2a); affected 15.2(8i); affected 16.0(5h); affected 15.3(2b); affected 16.0(3g); affected 16.0(5j); affected 15.3(2c); affected 16.0(6c); affected 15.3(2d); affected 16.1(1f); affected 16.0(7e); affected 16.0(8e); affected 15.3(2e); affected 16.0(8f); affected 16.1(2f); affected 16.1(2g); affected 15.3(2f); affected 16.0(9c); affected 16.1(3f); affected 16.0(9d); affected 16.0(6h); affected 16.0(8h); affected 16.1(3g); affected 16.0(9e); affected 16.1(4h); affected 16.1(5e); affected 16.2(1g); affected 16.0(9f); affected 16.2(2e)

CWE

CWE-284

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.