How severe is CVE-2017-12255?

CVE-2017-12255 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-12255 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12255?

CVE-2017-12255 affects Cisco Unified Computing System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12255?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-12255 published?

CVE-2017-12255 was published on 2017-09-21 and last updated on 2026-06-17.

CVE-2017-12255

CVE-2017-12255 is a medium-severity vulnerability in Cisco Unified Computing System with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 7.2
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Unified Computing System
Published: 2017-09-21
Last modified: 2026-06-17

Description

A vulnerability in the CLI of Cisco UCS Central Software could allow an authenticated, local attacker to gain shell access. The vulnerability is due to insufficient input validation of commands entered in the CLI, aka a Restricted Shell Break Vulnerability. An attacker could exploit this vulnerability by entering a specific command with crafted arguments. An exploit could allow the attacker to gain shell access to the underlying system. Cisco Bug IDs: CSCve70762.

Frequently asked questions

What is CVE-2017-12255?: A vulnerability in the CLI of Cisco UCS Central Software could allow an authenticated, local attacker to gain shell access. The vulnerability is due to insufficient input validation of commands entered in the CLI, aka a Restricted Shell Break Vulnerability. An attacker could exploit this vulnerability by entering a specific command with crafted arguments. An exploit could allow the attacker to gain shell access to the underlying system. Cisco Bug IDs: CSCve70762.
How severe is CVE-2017-12255?: CVE-2017-12255 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-12255 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12255?: CVE-2017-12255 affects Cisco Unified Computing System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12255?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-12255 published?: CVE-2017-12255 was published on 2017-09-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:unified_computing_system:1.5\(1c\):*:*:*:*:*:*:*

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