8.6

CVE-2021-1230: cisco cisco nx-os system software in aci mode Improper Handling of Parameters

CVSS: 8.6v3.1HighModified
Published 24-02-2021Last modified 08-11-2024
Open JSON

Vulnerability summary

CVE-2021-1230 is a high (CVSS 8.6) Improper Handling of Parameters vulnerability in cisco cisco nx-os system software in aci mode. EPSS estimates a 1.53% chance of exploitation in the next 30 days, higher than 74.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
1.53%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-02-2021
    PublishedVulnerability first disclosed.
  2. 08-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability with the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a routing process to crash, which could lead to a denial of service (DoS) condition. This vulnerability is due to an issue with the installation of routes upon receipt of a BGP update. An attacker could exploit this vulnerability by sending a crafted BGP update to an affected device. A successful exploit could allow the attacker to cause the routing process to crash, which could cause the device to reload. This vulnerability applies to both Internal BGP (IBGP) and External BGP (EBGP). Note: The Cisco implementation of BGP accepts incoming BGP traffic from explicitly configured peers only. To exploit this vulnerability, an attacker would need to send a specific BGP update message over an established TCP connection that appears to come from a trusted BGP peer.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.53%

Chance of exploitation in the next 30 days

Percentile

74%

Versus all other CVEs

30-day change

0.00 pp

From 1.53% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco nx-os system software in aci moden/a
  • nx-os12.0\(1m\) | 12.0\(1n\) | 12.0\(1o\) | 12.0\(1p\) | 12.0\(1q\) | 12.0\(1r\) | 12.0\(2f\) | 12.0\(2g\) | 12.0\(2h\) | 12.0\(2l\) | 12.0\(2m\) | 12.0\(2n\) | 12.0\(2o\) | 12.1\(1h\) | 12.1\(1i\) | 12.1\(2e\) | 12.1\(2g\) | 12.1\(2k\) | 12.1\(3g\) | 12.1\(3h\) | 12.1\(3j\) | 12.1\(4a\) | 12.2\(1k\) | 12.2\(1n\) | 12.2\(1o\) | 12.2\(2e\) | 12.2\(2f\) | 12.2\(2i\) | 12.2\(2j\) | 12.2\(2k\) | 12.2\(2q\) | 12.2\(3j\) | 12.2\(3p\) | 12.2\(3r\) | 12.2\(3s\) | 12.2\(3t\) | 12.2\(4f\) | 12.2\(4p\) | 12.2\(4q\) | 12.2\(4r\) | 12.3\(1e\) | 12.3\(1f\) | 12.3\(1i\) | 12.3\(1l\) | 12.3\(1o\) | 12.3\(1p\) | 13.0\(1k\) | 13.0\(2h\) | 13.0\(2k\) | 13.0\(2n\) | 13.1\(1i\) | 13.1\(2m\) | 13.1\(2o\) | 13.1\(2p\) | 13.1\(2q\) | 13.1\(2s\) | 13.1\(2t\) | 13.1\(2u\) | 13.1\(2v\) | 13.2\(1l\) | 13.2\(1m\) | 13.2\(2l\) | 13.2\(2o\) | 13.2\(3i\) | 13.2\(3j\) | 13.2\(3n\) | 13.2\(3o\) | 13.2\(3r\) | 13.2\(3s\) | 13.2\(4d\) | 13.2\(4e\) | 13.2\(5d\) | 13.2\(5e\) | 13.2\(5f\) | 13.2\(6i\) | 13.2\(7f\) | 13.2\(7k\) | 13.2\(8d\) | 13.2\(9b\) | 13.2\(9f\) | 13.2\(9h\) | 13.2\(41d\) | 14.0\(1h\) | 14.0\(2c\) | 14.0\(3c\) | 14.0\(3d\) | 14.1\(1i\) | 14.1\(1j\) | 14.1\(1k\) | 14.1\(1l\) | 14.1\(2g\) | 14.1\(2m\) | 14.1\(2o\) | 14.1\(2s\) | 14.1\(2u\) | 14.1\(2w\) | 14.1\(2x\) | 14.2\(1i\) | 14.2\(1j\) | 14.2\(1l\) | 14.2\(2e\) | 14.2\(2f\) | 14.2\(2g\)

1 vendor · 2 products

References

1 links