CISA KEV · Known exploitedMedium

CVE-2017-12319

Cisco IOS XE Software

A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table, which could result in network instability. The vulnerability exists due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) draft between IOS XE software releases. When the BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update pa...

CVSS: 5.9
EPSS: 5.28%
CISA KEV: Listed
Published: 2018.03.27

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability5.28%

Technical severityCVSS 5.9

Vulnerability overview

Affected product and versions

Product: Cisco IOS XE Software
Affected versions: Cisco IOS XE, 15.4(1)s, < 16.3
Fixed versions: 16.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.03.24

1
Identify
Confirm that Cisco IOS XE Software and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-20
KEV added: 2022.03.03
Ransomware use: 미확인