CVE-2026-20038
A vulnerability in the endpoint group (EPG) contract functionality of Cisco Nexus 9000 Series…
- Risk score
- 49/100
- CVSS
- 5.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 7 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.8 medium
- On your watchlist: cisco
References
Original 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.
Last activity 7 Oct 2026. Patch Forecast updates every hour.