CVE-2019-1810

Cisco Nexus 3000 Series and 9000 Series Switches in NX-OS Mode CLI Command Software Image Signature Verification Vulnerability

MEDIUM

6.7

CVSS Score

Published: May 15, 2019 at 10:15 PM UTC

Updated: June 17, 2026 at 02:29 AM UTC

5 products affected across 1 vendorNx OSN9K-C92304QcN9K-C9232C

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Severity

MEDIUM6.7

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

A vulnerability in the Image Signature Verification feature used in an NX-OS CLI command in Cisco Nexus 3000 Series and 9000 Series Switches could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability exists because software digital signatures are not properly verified during CLI command execution. An attacker could exploit this vulnerability to install an unsigned software image on an affected device. Note: If the device has not been patched for the vulnerability previously disclosed in the Cisco Security Advisory cisco-sa-20190306-nxos-sig-verif, a successful exploit could allow the attacker to boot a malicious software image.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nx OS · Cisconpm

95%

v < 8.3(1)6.1(2)i3(4) ≤ v < 7.0(3)i7(5)7.0(3)i3(1) ≤ v < 7.0(3)i7(1)7.0(3)i4(1) ≤ v < 7.0(3)i7(5)7.0(3)i4(2) ≤ v < 7.0(3)i7(5)7.0(3)i7(2) ≤ v < 9.2(1)7.0(3)i7(5a) ≤ v < 9.2(2)

Affected range stops below 7.0(3)i7(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i7(5), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.3(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 9.2(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 9.2(2), so it looks safe — our inference, not a vendor statement

cisco-n3k-c3164q (environment) · cisco-n3k-c3232c (environment) · cisco-n9k-c92304qc (environment) · cisco-n9k-c9232c (environment)

N3K-C3164Q · Ciscodevice

80%

All versions

N3K-C3232C · Ciscodevice

80%

All versions

N9K-C92304Qc · Ciscodevice

80%

All versions

N9K-C9232C · Ciscodevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-sisv

References (2)

VDB Entryx_refsource_BIDBroken LinkThird Party Advisory

Source: [email protected]

http://www.securityfocus.com/bid/108431

Vendor Advisoryx_refsource_CISCO

Source: [email protected]

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-sisv

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: HIGH
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-347

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