CVE-2019-1846

Name: CVE-2019-1846
Creator: NVD / NIST
Published: 2019-05-16T02:29:00.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.60%

Last modified Jun 17, 2026

CVE-2019-1846 is a vulnerability of currently unknown severity. A vulnerability in the Multiprotocol Label Switching (MPLS) Operations, Administration, and Maintenance (OAM) implementation of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to the incorrect handling of certain MPLS OAM packets. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

A vulnerability in the Multiprotocol Label Switching (MPLS) Operations, Administration, and Maintenance (OAM) implementation of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to the incorrect handling of certain MPLS OAM packets. An attacker could exploit this vulnerability by sending malicious MPLS OAM packets to an affected device. A successful exploit could allow the attacker to cause the lspv_server process to crash. The crash could lead to system instability and the inability to process or forward traffic though the device, resulting in a DoS condition that require manual intervention to restore normal operating conditions.

Metrics

EPSS Probability

0.60%

44.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Cisco	Ios Xr	5.3.3	Sp10

References

http://www.securityfocus.com/bid/108363Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-asr9k-mpls-dosVendor Advisory
http://www.securityfocus.com/bid/108363Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-asr9k-mpls-dosVendor Advisory

Timeline

Published: May 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1846?

How severe is CVE-2019-1846?

Severity scoring for CVE-2019-1846 is pending analysis. The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1846?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-1846?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST