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CVE-2019-1750

Cisco IOS XE Software Catalyst 4500 Cisco Discovery Protocol Denial of Service Vulnerability

High7.4EPSS 0.71%
Published
Updated
Reserved
Assigned by
cisco

Description

A vulnerability in the Easy Virtual Switching System (VSS) of Cisco IOS XE Software on Catalyst 4500 Series Switches could allow an unauthenticated, adjacent attacker to cause the switches to reload. The vulnerability is due to incomplete error handling when processing Cisco Discovery Protocol (CDP) packets used with the Easy Virtual Switching System. An attacker could exploit this vulnerability by sending a specially crafted CDP packet. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Scores

CVSS scores of CVE-2019-1750, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.0High7.4CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVDNVD · Modified3.0High7.4CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.71% · top 46% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

Affected products

  • Cisco · Cisco IOS XE Software

    • affected 3.6.0E
    • affected 3.6.1E
    • affected 3.6.0aE
    • affected 3.6.0bE
    • affected 3.6.2aE
    • affected 3.6.2E
    • affected 3.6.3E
    • affected 3.6.4E
    • affected 3.6.5E
    • affected 3.6.6E
    • affected 3.6.5aE
    • affected 3.6.5bE
    • affected 3.6.7E
    • affected 3.6.8E
    • affected 3.6.7aE
    • affected 3.6.7bE
    • affected 3.6.9E
    • affected 3.6.10E
    • affected 3.7.0E
    • affected 3.7.1E
    • affected 3.7.2E
    • affected 3.7.3E
    • affected 3.8.0E
    • affected 3.8.1E
    • affected 3.8.2E
    • affected 3.8.3E
    • affected 3.8.4E
    • affected 3.8.5E
    • affected 3.8.5aE
    • affected 3.8.6E
    • affected 3.8.7E
    • affected 3.9.0E
    • affected 3.9.1E
    • affected 3.9.2E
    • affected 3.9.2bE
    • affected 16.9.2h
    • affected 3.10.0E
    • affected 3.10.1E
    • affected 3.10.0cE
    • affected 3.10.2E
    • and 2 more

What to do

Exploitation: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2019-1750 badge
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Record last updated .