What is CVE-2016-1384?

CVE-2016-1384 is a high-severity vulnerability in Cisco iOS, classified under CWE-264. CVSS score: 7.5/10. Published 2016-04-20.

How severe is CVE-2016-1384?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cisco iOS

CVE-2016-1384

The NTP implementation in Cisco IOS 15.1 and 15.5 and IOS XE 3.2 through 3.17 allows remote attackers to modify the system time via crafted packets, aka Bug ID CSCux46898.

Published 2016-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.025 (84.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Cisco iOS — versions 15.1(2)s1, 15.5\(1\)s3, 15.5(1)s2
Cisco iOS Xe — versions 3.2.0ja, 3.2.0s, 3.2.0se

Weakness classification (CWE)

CWE-264

References

www.securityfocus.com/bid/86685 (vdb-entry)
www.securitytracker.com/id/1035622 (vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160419… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2016-1384?: CVE-2016-1384 is a high-severity vulnerability in Cisco iOS, classified under CWE-264. CVSS score: 7.5/10. Published 2016-04-20.
How severe is CVE-2016-1384?: High severity. CVSS v3 base score is 7.5 out of 10.