How severe is CVE-2020-3243?

CVE-2020-3243 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-3243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 88% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3243?

CVE-2020-3243 primarily affects Cisco Ucs Director. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-3243 published?

CVE-2020-3243 was published on 2020-04-15 and last updated on 2026-06-17.

CVE-2020-3243

CVE-2020-3243 is a critical-severity vulnerability in Cisco Ucs Director with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 88% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 88% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Cisco Ucs Director
Published: 2020-04-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-3243?: 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.
How severe is CVE-2020-3243?: CVE-2020-3243 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-3243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 88% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3243?: CVE-2020-3243 primarily affects Cisco Ucs Director. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-3243 published?: CVE-2020-3243 was published on 2020-04-15 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:a:cisco:ucs_director:6.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.0.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.0.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.0.1.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.5.0.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.6.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.7.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.7.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director:6.7.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:ucs_director_express_for_big_data:*:*:*:*:*:*:*:*

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