Cisco IOS XR Software Health Check Open Port Vulnerability
- Severity
- Medium6.5CVSS 3.1, Medium
- EPSS
- 11%
- Published
- 26 May 2022
- Updated
- 17 Jun 2026
Description
Title, description and vendor guidance are quoted from the source records.
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.
Weakness: CWE-200
Known exploited
Added to CISA KEV on 23 May 2022
Federal remediation due date: 13 Jun 2022
Required action: Apply updates per vendor instructions.
Exploit prediction
11% probability of exploitation in the next 30 days (percentile 96%).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
Patcharo shows this vulnerability for information but does not match versions for this product yet.
- Cisco Cisco IOS XR Software · n/a
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Cisco (CVE record)
- Cisco (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 27 Sept 2026, 23:42 UTC · Parser patcharo-kev/1.0.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC