How severe is CVE-2016-1257?

CVE-2016-1257 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-2016-1257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1257?

CVE-2016-1257 primarily affects Juniper Junos. In total, 35 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1257?

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

When was CVE-2016-1257 published?

CVE-2016-1257 was published on 2016-01-15 and last updated on 2026-06-17.

CVE-2016-1257

CVE-2016-1257 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: 4.3
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Juniper Junos
Published: 2016-01-15
Last modified: 2026-06-17

Description

The Routing Engine in Juniper Junos OS 13.2R5 through 13.2R8, 13.3R1 before 13.3R8, 13.3R7 before 13.3R7-S3, 14.1R1 before 14.1R6, 14.1R3 before 14.1R3-S9, 14.1R4 before 14.1R4-S7, 14.1X51 before 14.1X51-D65, 14.1X53 before 14.1X53-D12, 14.1X53 before 14.1X53-D28, 14.1X53 before 4.1X53-D35, 14.2R1 before 14.2R5, 14.2R3 before 14.2R3-S4, 14.2R4 before 14.2R4-S1, 15.1 before 15.1R3, 15.1F2 before 15.1F2-S2, and 15.1X49 before 15.1X49-D40, when LDP is enabled, allows remote attackers to cause a denial of service (RPD routing process crash) via a crafted LDP packet.

Frequently asked questions

What is CVE-2016-1257?: The Routing Engine in Juniper Junos OS 13.2R5 through 13.2R8, 13.3R1 before 13.3R8, 13.3R7 before 13.3R7-S3, 14.1R1 before 14.1R6, 14.1R3 before 14.1R3-S9, 14.1R4 before 14.1R4-S7, 14.1X51 before 14.1X51-D65, 14.1X53 before 14.1X53-D12, 14.1X53 before 14.1X53-D28, 14.1X53 before 4.1X53-D35, 14.2R1 before 14.2R5, 14.2R3 before 14.2R3-S4, 14.2R4 before 14.2R4-S1, 15.1 before 15.1R3, 15.1F2 before 15.1F2-S2, and 15.1X49 before 15.1X49-D40, when LDP is enabled, allows remote attackers to cause a denial of service (RPD routing process crash) via a crafted LDP packet.
How severe is CVE-2016-1257?: CVE-2016-1257 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-2016-1257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1257?: CVE-2016-1257 primarily affects Juniper Junos. In total, 35 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1257?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-1257 published?: CVE-2016-1257 was published on 2016-01-15 and last updated on 2026-06-17.

References

Affected products (35)

cpe:2.3:o:juniper:junos:13.2:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.2:r6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.2:r7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.2:r7-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:13.2:r7-s2:*:*:*:*:*:*
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: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: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:14.1x51:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x51:d60:*:*:*:*:*:*
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:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d26:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.2:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.2:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d20:*:*:*:*:*:*

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