What is CVE-2026-20033?

CVE-2026-20033 is a high-severity vulnerability in Cisco Nx-os System Software In Aci Mode, classified under Buffer Access with Incorrect Length Value. CVSS score: 7.4/10. Published 2026-02-25.

How severe is CVE-2026-20033?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Cisco Nx-os System Software In Aci Mode

CVE-2026-20033

A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient valid…

EPSS: 0.000 (5.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Nx-os System Software In Aci Mode — versions 15.2(1g), 15.2(2e), 15.2(2f)

Weakness classification (CWE)

CWE-805 — Buffer Access with Incorrect Length Value

References

cisco-sa-nxos-cpdos-qLsv6pFD

Frequently asked questions

What is CVE-2026-20033?: CVE-2026-20033 is a high-severity vulnerability in Cisco Nx-os System Software In Aci Mode, classified under Buffer Access with Incorrect Length Value. CVSS score: 7.4/10. Published 2026-02-25.
How severe is CVE-2026-20033?: High severity. CVSS v3 base score is 7.4 out of 10.