Is CVE-2022-20920 being actively exploited?

CVE-2022-20920 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2022-20920?

CVE-2022-20920 has a CVSS 3.1 base score of 7.7 (HIGH).

CVE-2022-20920

HIGH · CVSS 7.7EPSS 0.9%EU EUVD

A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload.

Key facts

CVSS score: 7.7 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weakness (CWE): CWE-755
EPSS score: 0.9% (60th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2022-26170)
Published: October 10, 2022
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-26170 in the EU Vulnerability Database. Last updated in EUVD on May 27, 2026.

View on the EU Vulnerability Database

Affected products

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and 950 more…

Certified products that may be affected

17 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Catalyst 9800 (40/80/L) Wireless Controllers running IOS-XE 16.12 - Cisco Systems, Inc. - FIPS 140 4606 - historical
Cisco Aironet 1562e/i/d/ps, 2802e/i, 3802e/i/p, 4800 and IW6300H- AC/DC/DCW Wireless LAN Access Points, AireOS Version 8.10MR3 and IOS-XE 17.3 - Cisco Systems, Inc. - FIPS 140 4129 - historical
Cisco Aggregation Services Router 1000 Series (ASR1K), Cisco Cloud Services Router 1000V (CSR1000V), Cisco Integrated Services Router 1100 Series (ISR1100), Cisco Integrated Services Router 4200 Series (ISR4K) running IOS-XE 17.3 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-11186-2021 - archived
Cisco Catalyst Industrial Ethernet 3x00 Rugged Series (IE3200, IE3300, IE3400, IE3400H) Switches running IOS-XE 17.3 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-11177-2021 - archived
Cisco Catalyst 9800 (40/80/L) Wireless Controllers running IOS-XE 16.12 - Cisco Systems, Inc. - FIPS 140 3883 - historical

See all 17 in the Security Certifications Explorer.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-excpt-dos-FzOBQTnk(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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