What is CVE-2022-20821?

CVE-2022-20821 is a medium-severity vulnerability in Cisco Ios Xr Software, classified under Information Disclosure. CVSS score: 6.5/10. Published 2022-05-26.

How severe is CVE-2022-20821?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2022-20821 known to be exploited?

Yes. CVE-2022-20821 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.

Information disclosure in Cisco Ios Xr Software

CVE-2022-20821

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…

Vulnerability class: Information Disclosure

EPSS: 0.088 (92.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Cisco Ios Xr Software — versions n/a

Weakness classification (CWE)

CWE-200 — Information Disclosure

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-23. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-13.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

20220520 Cisco IOS XR Software Health Check Open Port Vulnerability (vendor-advisory, x_refsource_CISCO)

Frequently asked questions

What is CVE-2022-20821?: CVE-2022-20821 is a medium-severity vulnerability in Cisco Ios Xr Software, classified under Information Disclosure. CVSS score: 6.5/10. Published 2022-05-26.
How severe is CVE-2022-20821?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2022-20821 known to be exploited?: Yes. CVE-2022-20821 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.