How severe is CVE-2020-3243?

CVE-2020-3243 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-3243?

Affected package information for CVE-2020-3243 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2020-3243?

No fixed version has been published for CVE-2020-3243 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2020-3243 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2020-3243, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2020-3243?

CVE-2020-3243 has an EPSS (Exploit Prediction Scoring System) score of 90.2%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2020-3243?

CVE-2020-3243 is classified as Improper Input Validation (CWE-20), Improper Privilege Management (CWE-269). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2020-3243?

CVE-2020-3243 affects cisco ucs director (18 versions, e.g. 6.0.0.0, 6.0.0.1, 6.0.1.0…); cisco ucs director express for big data. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2020-3243 published, and has it been updated?

CVE-2020-3243 was published on April 15, 2020 and was last updated on November 21, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2020-3243

CRITICAL

Multiple vulnerabilities in the REST API of Cisco UCS Director and Cisco UCS Director Express for Big Data may allow a remote attacker to bypass authentication or conduct directory…

Published

Apr 15, 2020

Updated

Nov 21, 2024

Affected

0 pkgs

Patched

None yet

Exploits

1 known

EPSS Exploitation Probability

via FIRST.org ↗

90.2%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Multiple vulnerabilities in the REST API of Cisco UCS Director and Cisco UCS Director Express for Big Data may allow a remote attacker to bypass authentication or conduct directory traversal attacks on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Affected Products

2 products · 19 configurations

Application

ucs directorcisco

18 versions

6.0.0.06.0.0.16.0.1.06.0.1.16.0.1.26.0.1.36.5.0.06.5.0.16.5.0.26.5.0.36.5.0.46.6.0.0

Application

ucs director express for big datacisco

≤ 3.7.3.0

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Multiple vulnerabilities in the REST API of Cisco UCS Director and Cisco…

github.comMetasploitFeb 2021

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2020-3243 in your stack?

O3 detects CVE-2020-3243 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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