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CVE-2021-1264

29
FAUCET Score

CVE-2021-1264 is a command injection vulnerability in the Command Runner tool of Cisco DNA Center, affecting Cisco Catalyst Center. This flaw allows an authenticated, remote attacker to execute arbitrary CLI commands on managed devices due to insufficient input validation. With a CVSS score of 8.8 (HIGH), it presents a significant risk, as an attacker can achieve high impact on confidentiality, integrity, and availability with low attack complexity. While there is no known active exploitation (KEV) or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:catalyst_center:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.72%
Probability of exploitation in next 30 days
EPSS Percentile
88.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0372 is in the 88th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-dnac-cmdinj-erumsWh9
Vendor Advisory