How severe is CVE-2020-15518?

CVE-2020-15518 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15518?

CVE-2020-15518 primarily affects Veeam Veeam Availability Suite. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15518?

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-2020-15518 published?

CVE-2020-15518 was published on 2020-07-03 and last updated on 2026-06-17.

CVE-2020-15518

CVE-2020-15518 is a high-severity vulnerability in Veeam Veeam Availability Suite with a CVSS 3.x base score of 8.8. 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-862.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Veeam Veeam Availability Suite
Published: 2020-07-03
Last modified: 2026-06-17

Description

VeeamFSR.sys in Veeam Availability Suite before 10 and Veeam Backup & Replication before 10 has no device object DACL, which allows unprivileged users to achieve total control over filesystem I/O requests.

Frequently asked questions

What is CVE-2020-15518?: VeeamFSR.sys in Veeam Availability Suite before 10 and Veeam Backup & Replication before 10 has no device object DACL, which allows unprivileged users to achieve total control over filesystem I/O requests.
How severe is CVE-2020-15518?: CVE-2020-15518 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15518?: CVE-2020-15518 primarily affects Veeam Veeam Availability Suite. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-15518?: 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-2020-15518 published?: CVE-2020-15518 was published on 2020-07-03 and last updated on 2026-06-17.

References

https://zwclose.github.io/veeamon

Affected products (2)

cpe:2.3:a:veeam:veeam_availability_suite:*:*:*:*:*:*:*:*
cpe:2.3:a:veeam:veeam_backup_\&_replication:*:*:*:*:*:*:*:*

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