CVE-2016-1277

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

1.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2016-09-09 14:05 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:41 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.7% in the next 30 days (EPSS).
• Severity: 5.9 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2016-09-09 14:05 UTC

Last modified

2026-06-17 00:41 UTC

Exploit probability

1.7% · EPSS, next 30 days

Weakness

CWE-20 · Improper input validation

Record status

Modified

Affected

• Juniper Junos ≤ 12.1x46
• Juniper Junos 12.1x47
• Juniper Junos 12.3x48
• Juniper Junos 13.3
• Juniper Junos 14.1
• Juniper Junos 14.1x53
• Juniper Junos 14.2
• Juniper Junos 15.1

Attack profile CVSS 3.0 · 5.9

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-1277.md and follow it. Check whether this project is affected by CVE-2016-1277. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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