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CVE-2019-16027 Details

Description

A vulnerability in the implementation of the Intermediate System–to–Intermediate System (IS–IS) routing protocol functionality in Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition in the IS–IS process. The vulnerability is due to improper handling of a Simple Network Management Protocol (SNMP) request for specific Object Identifiers (OIDs) by the IS–IS process. An attacker could exploit this vulnerability by sending a crafted SNMP request to the affected device. A successful exploit could allow the attacker to cause a DoS condition in the IS–IS process.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:7.7 HIGHVector:CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-dos	CVE	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-dos	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	[email protected]
CWE-20	Improper Input Validation	[email protected]

Affected Products

Product	Versions
cisco ios xr	4.3.2 5.2.5 6.2.2 6.2.3 6.2.25
CPE cpe:2.3:o:cisco:ios_xr:4.3.2:::::::* cpe:2.3:o:cisco:ios_xr:5.2.5:::::::* cpe:2.3:o:cisco:ios_xr:6.2.2:::::::* cpe:2.3:o:cisco:ios_xr:6.2.3:::::::* cpe:2.3:o:cisco:ios_xr:6.2.25:::::::* cpe:2.3:o:cisco:ios_xr:6.3.3:::::::* cpe:2.3:o:cisco:ios_xr:6.4.2:::::::* cpe:2.3:o:cisco:ios_xr:6.1.3:::::::* cpe:2.3:o:cisco:ios_xr:6.1.4:::::::* cpe:2.3:o:cisco:ios_xr:6.5.2:::::::* cpe:2.3:o:cisco:ios_xr:6.5.3:::::::* cpe:2.3:o:cisco:ios_xr:6.3.15:::::::* cpe:2.3:o:cisco:ios_xr:6.6.1:::::::* cpe:2.3:o:cisco:ios_xr:6.6.25:::::::* cpe:2.3:o:cisco:ios_xr:6.6.2:::::::* cpe:2.3:o:cisco:ios_xr:6.1.2:::::::* cpe:2.3:o:cisco:ios_xr:6.3.2:::::::* Remediation No remediation found in references.
cisco xr 12404	All versions
CPE cpe:2.3:h:cisco:xr_12404:-:::::::* Remediation No remediation found in references.
cisco xr 12406	All versions
CPE cpe:2.3:h:cisco:xr_12406:-:::::::* Remediation No remediation found in references.
cisco xr 12410	All versions
CPE cpe:2.3:h:cisco:xr_12410:-:::::::* Remediation No remediation found in references.
cisco xr 12416	All versions
CPE cpe:2.3:h:cisco:xr_12416:-:::::::* Remediation No remediation found in references.
cisco ncs 6000	All versions
CPE cpe:2.3:h:cisco:ncs_6000:-:::::::* Remediation No remediation found in references.
cisco ncs 6008	All versions
CPE cpe:2.3:h:cisco:ncs_6008:-:::::::* Remediation No remediation found in references.
cisco ncs 5001	All versions
CPE cpe:2.3:h:cisco:ncs_5001:-:::::::* Remediation No remediation found in references.
cisco ncs 5002	All versions
CPE cpe:2.3:h:cisco:ncs_5002:-:::::::* Remediation No remediation found in references.
cisco ncs 5011	All versions
CPE cpe:2.3:h:cisco:ncs_5011:-:::::::* Remediation No remediation found in references.
cisco ncs 5500	All versions
CPE cpe:2.3:h:cisco:ncs_5500:-:::::::* Remediation No remediation found in references.
cisco ncs 5501	All versions
CPE cpe:2.3:h:cisco:ncs_5501:-:::::::* Remediation No remediation found in references.
cisco ncs 5502	All versions
CPE cpe:2.3:h:cisco:ncs_5502:-:::::::* Remediation No remediation found in references.
cisco ncs 5508	All versions
CPE cpe:2.3:h:cisco:ncs_5508:-:::::::* Remediation No remediation found in references.
cisco ncs 5516	All versions
CPE cpe:2.3:h:cisco:ncs_5516:-:::::::* Remediation No remediation found in references.
cisco crs	All versions
CPE cpe:2.3:h:cisco:crs:-:::::::* Remediation No remediation found in references.
cisco xrv 9000	All versions
CPE cpe:2.3:h:cisco:xrv_9000:-:::::::* Remediation No remediation found in references.
cisco ncs 540	All versions
CPE cpe:2.3:h:cisco:ncs_540:-:::::::* Remediation No remediation found in references.
cisco ncs 560	All versions
CPE cpe:2.3:h:cisco:ncs_560:-:::::::* Remediation No remediation found in references.
cisco asr 9000	All versions
CPE cpe:2.3:h:cisco:asr_9000:-:::::::* Remediation No remediation found in references.
cisco asr 9000v	v2
CPE cpe:2.3:h:cisco:asr_9000v:v2:::::::* Remediation No remediation found in references.
cisco asr 9001	All versions
CPE cpe:2.3:h:cisco:asr_9001:-:::::::* Remediation No remediation found in references.
cisco asr 9006	All versions
CPE cpe:2.3:h:cisco:asr_9006:-:::::::* Remediation No remediation found in references.
cisco asr 9010	All versions
CPE cpe:2.3:h:cisco:asr_9010:-:::::::* Remediation No remediation found in references.
cisco asr 9901	All versions
CPE cpe:2.3:h:cisco:asr_9901:-:::::::* Remediation No remediation found in references.
cisco asr 9903	All versions
CPE cpe:2.3:h:cisco:asr_9903:-:::::::* Remediation No remediation found in references.
cisco asr 9904	All versions
CPE cpe:2.3:h:cisco:asr_9904:-:::::::* Remediation No remediation found in references.
cisco asr 9906	All versions
CPE cpe:2.3:h:cisco:asr_9906:-:::::::* Remediation No remediation found in references.
cisco asr 9910	All versions
CPE cpe:2.3:h:cisco:asr_9910:-:::::::* Remediation No remediation found in references.
cisco asr 9912	All versions
CPE cpe:2.3:h:cisco:asr_9912:-:::::::* Remediation No remediation found in references.
cisco asr 9920	All versions
CPE cpe:2.3:h:cisco:asr_9920:-:::::::* Remediation No remediation found in references.
cisco asr 9922	All versions
CPE cpe:2.3:h:cisco:asr_9922:-:::::::* Remediation No remediation found in references.

Change History

7 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 12, 2022	Reanalysis	[email protected]
May 4, 2022	Reanalysis	[email protected]
Jan 31, 2020	Initial Analysis	[email protected]

CVE-2019-16027 Details

Description

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