Cisco IOS Software Precision Time Protocol Denial of Service Vulnerability

published 2018-10-05 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-1296

cvss: 8.6; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.5%; EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

A vulnerability in the Precision Time Protocol (PTP) subsystem of Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of the Precision Time Protocol. The vulnerability is due to insufficient processing of PTP packets. An attacker could exploit this vulnerability by sending a custom PTP packet to, or through, an affected device. A successful exploit could allow the attacker to cause a DoS condition for the PTP subsystem, resulting in time synchronization issues across the network.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-094-03 updated 2019-04-04 cvss 7.5

Rockwell Automation Stratix 5400/5410/5700/8000/8300 and ArmorStratix 5700

Rockwell Automation Allen-Bradley ArmorStratix 5700 <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 5400 <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 5410 <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 5700 <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 8000 <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 8300 < 15.2(4)EA7
affected: vendor fix, mitigation “FRN 15.2(6)E2a: Allen-Bradley Stratix 5400” rockwellautomation.custhelp.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 23 mo ago (2024-11-25)

Exploit prediction

3.52% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	8.6	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

Cisco Cisco IOS Software

Classification

Weakness

CWE-399 Resource Management Errors

Technology feeds

Cisco IOS rss critical rss

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-ptp
vendor-advisory
securitytracker.com /id/1041737
vdb-entry, third-party-advisory
securityfocus.com /bid/105427
vdb-entry, third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-19-094-03

Sources

CVE List CVE-2018-0473
NVD CVE-2018-0473

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary