CVE-2019-15998

Cisco IOS XR Software NETCONF Over Secure Shell ACL Bypass Vulnerability

MEDIUM

5.3

CVSS Score

Published: November 26, 2019 at 03:41 AM UTC

Updated: June 17, 2026 at 02:21 AM UTC

8 products affected across 1 vendorIOS XrAsr 9010Asr 9904

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.7%

SSVC

No known exploit

Description

A vulnerability in the access-control logic of the NETCONF over Secure Shell (SSH) of Cisco IOS XR Software may allow connections despite an access control list (ACL) that is configured to deny access to the NETCONF over SSH of an affected device. The vulnerability is due to a missing check in the NETCONF over SSH access control list (ACL). An attacker could exploit this vulnerability by connecting to an affected device using NETCONF over SSH. A successful exploit could allow the attacker to connect to the device on the NETCONF port. Valid credentials are required to access the device. This vulnerability does not affect connections to the default SSH process on the device.

Affected

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

IOS Xr · Cisco

95%

6.5.1 6.5.2 6.5.3

cisco-asr-9001 (environment) · cisco-asr-9006 (environment) · cisco-asr-9010 (environment) · cisco-asr-9901 (environment) · cisco-asr-9904 (environment) · cisco-asr-9912 (environment) · cisco-asr-9922 (environment)

Asr 9001 · Ciscodevice

80%

All versions

Asr 9006 · Ciscodevice

80%

All versions

Asr 9010 · Ciscodevice

80%

All versions

Asr 9901 · Ciscodevice

80%

All versions