CVE-2015-6273: Cisco IOS XE

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco IOS XE before 3.1.2S on ASR 1000 devices mishandles the automatic setup of Virtual Fragment Reassembly (VFR) by certain firewall and NAT components, which allows remote attackers to cause a denial of service (Embedded Services Processor crash) via crafted IP packets, aka Bug IDs CSCtf87624, CSCte93229, CSCtd19103, and CSCti63623.

Affected products

• Cisco IOS XE: version 2.2.1 only; version 2.2.2 only; version 2.2.3 only; version 3.1.0s only; version 3.1.1s only

Published 2015-08-29. Last modified 2026-06-17.