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CVE-2022-20821

CWE-200

High

82.2

RPS

Description

A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system.

Source: NVD

Signals

CVSS
6.5
Medium · v3.1
EPSS
11.47%
Probability of exploitation in the next 30 days (FIRST)
CISA KEV
In CISA KEV since May 2022
Fix commit
No known fix commit
Sources: MoreFixes, FreshFixes
Weakness
CWE-200
Published
26 May 2022
Last modified 28 Oct 2025

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Data as of 7 Oct 2026, 05:16 UK time

CVE-2022-20821 · RPS 82.2 · DevSecure Intelligence