CVE-2017-6599: Cisco IOS XR

Medium severity, CVSS 5.3. EPSS: 2% chance of exploitation in the next 30 days.

A vulnerability in Google-defined remote procedure call (gRPC) handling in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the Event Management Service daemon (emsd) to crash due to a system memory leak, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco IOS XR Software with gRPC enabled. More Information: CSCvb14433. Known Affected Releases: 6.1.1.BASE 6.2.1.BASE. Known Fixed Releases: 6.2.1.22i.MGBL 6.1.22.9i.MGBL 6.1.21.12i.MGBL 6.1.2.13i.MGBL.

Affected products

• Cisco IOS XR: version 6.1.1 only; version 6.2.1 only

Published 2017-04-07. Last modified 2026-06-17.