How severe is CVE-2016-4926?

CVE-2016-4926 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4926 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4926?

CVE-2016-4926 affects Juniper Junos Space. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4926?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-4926 published?

CVE-2016-4926 was published on 2017-03-20 and last updated on 2026-06-17.

CVE-2016-4926

CVE-2016-4926 is a critical-severity vulnerability in Juniper Junos Space with a CVSS 3.x base score of 9.8. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Juniper Junos Space
Published: 2017-03-20
Last modified: 2026-06-17

Description

Insufficient authentication vulnerability in Junos Space before 15.2R2 allows remote network based users with access to Junos Space web interface to perform certain administrative tasks without authentication.

Frequently asked questions

What is CVE-2016-4926?: Insufficient authentication vulnerability in Junos Space before 15.2R2 allows remote network based users with access to Junos Space web interface to perform certain administrative tasks without authentication.
How severe is CVE-2016-4926?: CVE-2016-4926 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-4926 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4926?: CVE-2016-4926 affects Juniper Junos Space. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4926?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-4926 published?: CVE-2016-4926 was published on 2017-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:juniper:junos_space:*:r1:*:*:*:*:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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