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CVE record · CVE-2026-20171

Cisco Nexus 3000 and 9000 Series Border Gateway Protocol Denial of Service Vulnerability

CVSS 6.8 MediumEPSS 0.0047 · 40th percentile

Published by the CVE Program (CNA: cisco) at 20 May 2026, 16:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Cisco Cisco NX-OS Software
  • affected 10.2(1)
  • affected 10.2(1q)
  • affected 10.2(2)
  • affected 10.2(3)
  • affected 10.2(3t)
  • affected 10.2(2a)
  • affected 10.3(1)
  • affected 10.2(4)
  • affected 10.3(2)
  • affected 10.3(3)
  • affected 10.2(5)
  • affected 10.2(3v)
  • and 37 more
Other versions: unknown
Identifiers
CVE-2026-20171
CNA
cisco
Weakness (CWE)
CWE-670
Tags
Published
20 May 2026
Updated
20 May 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H CNA (cisco)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 20 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.