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CVE-2020-3243

85
FAUCET Score

CVE-2020-3243 describes multiple critical vulnerabilities in the REST API of Cisco UCS Director and Cisco UCS Director Express for Big Data. These flaws allow unauthenticated remote attackers to bypass authentication or perform directory traversal, potentially leading to full system compromise. With a CVSS score of 9.8 (Critical) and an EPSS score indicating high exploitability, this vulnerability poses a significant risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While not listed on the KEV catalog, a Metasploit module exists for a related Remote Code Execution exploit, and the vulnerability has garnered community discussion and media coverage, indicating awareness among security professionals.

Impacted Technologies

VendorProductVersion(s)CPE
6.0.0.0CPE matchmatch criteria
cpe:2.3:a:cisco:ucs_director:6.0.0.0:*:*:*:*:*:*:*
6.0.0.1CPE matchmatch criteria
cpe:2.3:a:cisco:ucs_director:6.0.0.1:*:*:*:*:*:*:*
6.0.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:ucs_director:6.0.1.0:*:*:*:*:*:*:*
6.0.1.1CPE matchmatch criteria
cpe:2.3:a:cisco:ucs_director:6.0.1.1:*:*:*:*:*:*:*
6.0.1.2CPE matchmatch criteria
cpe:2.3:a:cisco:ucs_director:6.0.1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
88.37%
Probability of exploitation in next 30 days
EPSS Percentile
99.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: Cisco UCS Director Cloupia Script RCE · Apr 15, 2020
This CVE's current EPSS score of 0.8837 is in the 99th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

packetstormsecurity.com / files/157955/Cisco-UCS-Director-Cloupia-Script-Remote-Code-Execution.html
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsd-mult-vulns-UNfpdW4E
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-20-540
Third Party AdvisoryVDB Entry