How severe is CVE-2016-1277?

CVE-2016-1277 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-1277 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1277?

CVE-2016-1277 primarily affects Juniper Junos. In total, 53 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1277?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-1277 published?

CVE-2016-1277 was published on 2016-09-09 and last updated on 2026-06-17.

CVE-2016-1277

CVE-2016-1277 is a medium-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 7.1
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Juniper Junos
Published: 2016-09-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2016-1277?: CVE-2016-1277 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-1277 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1277?: CVE-2016-1277 primarily affects Juniper Junos. In total, 53 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-1277 published?: CVE-2016-1277 was published on 2016-09-09 and last updated on 2026-06-17.

References

Affected products (53)

cpe:2.3:o:juniper:junos:*:d45:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x47:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.3:r8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1:r7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d16:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d26:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d27:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.2:r2:*:*:*:*:*:*

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