How severe is CVE-2016-1276?

CVE-2016-1276 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-2016-1276 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1276?

CVE-2016-1276 primarily affects Juniper Junos. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1276?

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

When was CVE-2016-1276 published?

CVE-2016-1276 was published on 2016-08-05 and last updated on 2026-06-17.

CVE-2016-1276

CVE-2016-1276 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-399.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 7.1
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Juniper Junos
Published: 2016-08-05
Last modified: 2026-06-17

Description

Juniper Junos OS before 12.1X46-D50, 12.1X47 before 12.1X47-D23, 12.3X48 before 12.3X48-D25, and 15.1X49 before 15.1X49-D40 on a High-End SRX-Series chassis system with one or more Application Layer Gateways (ALGs) enabled allow remote attackers to cause a denial of service (CPU consumption, fab link failure, or flip-flop failovers) via vectors related to in-transit traffic matching ALG rules.

Frequently asked questions

What is CVE-2016-1276?: Juniper Junos OS before 12.1X46-D50, 12.1X47 before 12.1X47-D23, 12.3X48 before 12.3X48-D25, and 15.1X49 before 15.1X49-D40 on a High-End SRX-Series chassis system with one or more Application Layer Gateways (ALGs) enabled allow remote attackers to cause a denial of service (CPU consumption, fab link failure, or flip-flop failovers) via vectors related to in-transit traffic matching ALG rules.
How severe is CVE-2016-1276?: CVE-2016-1276 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-2016-1276 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1276?: CVE-2016-1276 primarily affects Juniper Junos. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-1276 published?: CVE-2016-1276 was published on 2016-08-05 and last updated on 2026-06-17.

References

Affected products (20)

cpe:2.3:o:juniper:junos:12.1x46:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d40:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46: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:12.3x48:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d150:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x49:d35:*:*:*:*:*:*

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