CVE-2026-20171
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Cisco Nexus 3000 and 9000 Series Border Gateway Protocol Denial of Service Vulnerability
A vulnerability in the Border Gateway Protocol (BGP) enforce-first-as feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, remote attacker to trigger BGP peer flaps, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect parsing of a transitive BGP attribute. An attacker could exploit this vulnerability by sending a crafted BGP update through an established BGP peer session. If the update propagates to an affected device, it could cause the device to drop the BGP session and flap with the BGP peer that is forwarding this update, resulting in a DoS condition.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Cisco NX-OS Software
- Vendor
- Cisco
- Product
- Cisco NX-OS Software
- Platforms
- Unknown
- Default status
unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 10.2(1) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(1q) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(2) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(3) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(3t) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(2a) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(1) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(4) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(2) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(5) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(3v) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(1) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(99w) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(6) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3w) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(99x) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3o) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(4) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3p) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(4a) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(2) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3q) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(5) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(7) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(3) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3x) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(4g) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(1) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(8) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(3r) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(6) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(4) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(4h) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(2) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(7) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(5) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(3) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.2(9) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(4g) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.6(1) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(3t) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.3(8) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.4(6) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(3s) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(3e) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(3o) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.6(1s) | affected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5(3p) | affected | Unavailable | Unavailable | Unavailable | None listed |