How severe is CVE-2016-4927?

CVE-2016-4927 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4927 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4927?

CVE-2016-4927 affects Juniper Junos Space. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4927?

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

When was CVE-2016-4927 published?

CVE-2016-4927 was published on 2017-03-20 and last updated on 2026-06-17.

CVE-2016-4927

CVE-2016-4927 is a high-severity vulnerability in Juniper Junos Space with a CVSS 3.x base score of 8.1. 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: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Juniper Junos Space
Published: 2017-03-20
Last modified: 2026-06-17

Description

Insufficient validation of SSH keys in Junos Space before 15.2R2 allows man-in-the-middle (MITM) type of attacks while a Space device is communicating with managed devices.

Frequently asked questions

What is CVE-2016-4927?: Insufficient validation of SSH keys in Junos Space before 15.2R2 allows man-in-the-middle (MITM) type of attacks while a Space device is communicating with managed devices.
How severe is CVE-2016-4927?: CVE-2016-4927 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-4927 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4927?: CVE-2016-4927 affects Juniper Junos Space. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4927?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-4927 published?: CVE-2016-4927 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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