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CVE-2020-3355

19
FAUCET Score

CVE-2020-3355 describes a cross-site scripting (XSS) vulnerability in the web-based management interface of Cisco Data Center Network Manager (DCNM). This medium-severity vulnerability (CVSS 4.8) allows an authenticated, remote attacker with administrative credentials to inject malicious script code due to insufficient input validation. A successful exploit could lead to arbitrary script execution in the user's browser or access to sensitive browser-based information. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 11.3\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:data_center_network_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.8MEDIUM

CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.7
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.62%
Probability of exploitation in next 30 days
EPSS Percentile
46.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 80th percentile among its peer group of 4,937 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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-dcnm-stored-xss-yJyqBJGU
Vendor Advisory