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CVE Record

CVE-2019-1727: Cisco NX-OS Software Python Parser Privilege Escalation Vulnerability

A vulnerability in the Python scripting subsystem of Cisco NX-OS Software could allow an authenticated, local attacker to escape the Python parser and issue arbitrary commands to elevate the attacker's privilege level. The vulnerability is due to insufficient sanitization of user-supplied parameters that are passed to certain Python functions in the scripting sandbox of the affected device. An attacker could exploit this vulnerability to escape the scripting sandbox and execute arbitrary commands to elevate the attacker's privilege level. To exploit this vulnerability, the attacker must have local access and be authenticated to the targeted device with administrative or Python execution privileges. These requirements could limit the possibility of a successful exploit.

MediumCVSS 4.2Not KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2019-1727 affects Cisco NX-OS Software. A logged-in user with administrative or Python execution privileges could escape the Python scripting sandbox and run commands with elevated privileges. The business risk is limited by the need for local authenticated high-privilege access, but it matters on core network devices. Exposure is likely limited to Cisco NX-OS Software devices where users can authenticate locally and run administrative or Python scripting functions. The source bundle does not provide exact affected or fixed version numbers, so device owners should compare inventory against Cisco's advisory. Treat this as a moderate-priority network infrastructure issue. It is not described as remotely exploitable or actively exploited in the provided sources, but affected NX-OS devices are often high-value assets and privileged account compromise could turn this into a serious operational risk. Mitigation focus: Review Cisco's advisory for affected releases and fixed software guidance.; Upgrade or remediate NX-OS devices according to Cisco's published instructions.; Restrict administrative and Python execution privileges to required personnel only..

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Potential ATT&CK relevance

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Privilege behavior lookup

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CVE-2019-1727 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.2 (3.0)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.2CVSS 3.0MediumCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L0.83.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.2Medium
CVSS 3.0 vector shape for CVE-2019-1727Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco NX-OS Softwareunspecified, unspecified, unspecified, unspecifiedListed
Weakness

CWE details

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CWE-264 · source CWE mapping

Permissions, Privileges, and Access Controls

Permissions, Privileges, and Access Controls represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.