Cisco Intersight Virtual Appliance Command Injection Vulnerability

published 2021-10-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21398

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.7%; EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits: 0; none known

A vulnerability in the web-based management interface of Cisco Intersight Virtual Appliance could allow an authenticated, remote attacker to perform a command injection attack on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by using the web-based management interface to execute a command using crafted input. A successful exploit could allow the attacker to execute arbitrary commands using root-level privileges on an affected device.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-11-07)

Exploit prediction

2.75% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

Cisco Cisco Intersight Virtual Appliance

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command
CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsi2-command-inject-CGyC8y2R
vendor-advisory

Sources

CVE List CVE-2021-34748
NVD CVE-2021-34748

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary