CVE-2020-3251 | Multiple Vulnerabilities in Cisco UCS Director and Cisco UCS Director Express for Big Data

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.

Published: 2020-04-15 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-3251 is rated Moderate Risk (64/100): CVSS High severity, with high exploitation likelihood (EPSS 30.73%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-3251

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-08 36.87% 30.73% -6.15%
2 2025-11-21 65.40% 36.87% -28.53%
3 2025-11-18 — 65.40% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-3251

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2020-3251

Affected software / configurations for CVE-2020-3251

Vendor Product Version Raw CPE
cisco ucs_director 6.0.0.0 cpe:2.3:a:cisco:ucs_director:6.0.0.0:*:*:*:*:*:*:*
cisco ucs_director 6.0.0.1 cpe:2.3:a:cisco:ucs_director:6.0.0.1:*:*:*:*:*:*:*
cisco ucs_director 6.0.1.0 cpe:2.3:a:cisco:ucs_director:6.0.1.0:*:*:*:*:*:*:*
cisco ucs_director 6.0.1.1 cpe:2.3:a:cisco:ucs_director:6.0.1.1:*:*:*:*:*:*:*
cisco ucs_director 6.0.1.2 cpe:2.3:a:cisco:ucs_director:6.0.1.2:*:*:*:*:*:*:*
cisco ucs_director 6.0.1.3 cpe:2.3:a:cisco:ucs_director:6.0.1.3:*:*:*:*:*:*:*
cisco ucs_director 6.5.0.0 cpe:2.3:a:cisco:ucs_director:6.5.0.0:*:*:*:*:*:*:*
cisco ucs_director 6.5.0.1 cpe:2.3:a:cisco:ucs_director:6.5.0.1:*:*:*:*:*:*:*
cisco ucs_director 6.5.0.2 cpe:2.3:a:cisco:ucs_director:6.5.0.2:*:*:*:*:*:*:*
cisco ucs_director 6.5.0.3 cpe:2.3:a:cisco:ucs_director:6.5.0.3:*:*:*:*:*:*:*
cisco ucs_director 6.5.0.4 cpe:2.3:a:cisco:ucs_director:6.5.0.4:*:*:*:*:*:*:*
cisco ucs_director 6.6.0.0 cpe:2.3:a:cisco:ucs_director:6.6.0.0:*:*:*:*:*:*:*
cisco ucs_director 6.6.1.0 cpe:2.3:a:cisco:ucs_director:6.6.1.0:*:*:*:*:*:*:*
cisco ucs_director 6.6.2.0 cpe:2.3:a:cisco:ucs_director:6.6.2.0:*:*:*:*:*:*:*
cisco ucs_director 6.7.0.0 cpe:2.3:a:cisco:ucs_director:6.7.0.0:*:*:*:*:*:*:*
cisco ucs_director 6.7.1.0 cpe:2.3:a:cisco:ucs_director:6.7.1.0:*:*:*:*:*:*:*
cisco ucs_director 6.7.2.0 cpe:2.3:a:cisco:ucs_director:6.7.2.0:*:*:*:*:*:*:*
cisco ucs_director 6.7.3.0 cpe:2.3:a:cisco:ucs_director:6.7.3.0:*:*:*:*:*:*:*
cisco ucs_director_express_for_big_data <= 3.7.3.0 cpe:2.3:a:cisco:ucs_director_express_for_big_data:*:*:*:*:*:*:*:*

References for CVE-2020-3251

cvelogic Threat Intelligence