How severe is CVE-2020-15851?

CVE-2020-15851 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-2020-15851 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-2020-15851?

CVE-2020-15851 affects Nakivo Backup & Replication Transporter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15851?

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-2020-15851 published?

CVE-2020-15851 was published on 2020-09-24 and last updated on 2026-06-17.

CVE-2020-15851

CVE-2020-15851 is a critical-severity vulnerability in Nakivo Backup & Replication Transporter 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Nakivo Backup & Replication Transporter
Published: 2020-09-24
Last modified: 2026-06-17

Description

Lack of access control in Nakivo Backup & Replication Transporter version 9.4.0.r43656 allows remote users to access unencrypted backup repositories and the Nakivo Controller configuration via a network accessible transporter service. It is also possible to create or delete backup repositories.

Frequently asked questions

What is CVE-2020-15851?: Lack of access control in Nakivo Backup & Replication Transporter version 9.4.0.r43656 allows remote users to access unencrypted backup repositories and the Nakivo Controller configuration via a network accessible transporter service. It is also possible to create or delete backup repositories.
How severe is CVE-2020-15851?: CVE-2020-15851 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-2020-15851 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-2020-15851?: CVE-2020-15851 affects Nakivo Backup & Replication Transporter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15851?: 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-2020-15851 published?: CVE-2020-15851 was published on 2020-09-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nakivo:backup_\&_replication_transporter:9.4.0.r43656:*:*:*:*:*:*:*

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