Is CVE-2021-34729 being actively exploited?

CVE-2021-34729 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2021-34729?

CVE-2021-34729 has a CVSS 3.1 base score of 6.7 (MEDIUM).

CVE-2021-34729

MEDIUM · CVSS 6.7EPSS 0.4%EU EUVD

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software and Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary commands with elevated privileges on an affected device. This vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input in the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands with elevated privileges on the underlying operating system. An attacker would need valid user credentials to exploit this vulnerability.

Key facts

CVSS score: 6.7 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-77
EPSS score: 0.4% (28th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2021-21379)
Published: September 23, 2021
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-21379 in the EU Vulnerability Database. Last updated in EUVD on November 7, 2024.

View on the EU Vulnerability Database

Affected products

cisco / ios xe
cisco / ios xe sd-wan

Certified products that may be affected

21 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 21 in the Security Certifications Explorer.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3(Vendor Advisory)

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

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