What is CVE-2016-1277?

CVE-2016-1277 is a medium-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2016-09-09.

How severe is CVE-2016-1277?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Improper input validation in Juniper Junos

CVE-2016-1277

Juniper Junos OS before 12.1X46-D50, 12.1X47 before 12.1X47-D40, 12.3X48 before 12.3X48-D30, 13.3 before 13.3R9, 14.1 before 14.1R8, 14.1X53 before 14.1X53-D40, 14.2 before 14.2R6, 15.1 before 15.1F6 or 15.1R3, and 15.1X49 before 15.1X49-D40, when configured with a GRE or IPIP tunnel, allow remote attackers to cause a denial of service (kernel panic) via a crafted ICMP packet.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2016-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Juniper Junos — versions 12.1x47, 12.3x48, 13.3

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/91755 (vdb-entry)
www.securitytracker.com/id/1036306 (vdb-entry)
kb.juniper.net/InfoCenter/index (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2016-1277?: CVE-2016-1277 is a medium-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2016-09-09.
How severe is CVE-2016-1277?: Medium severity. CVSS v3 base score is 5.9 out of 10.