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UK Cyber Defence
VulnerabilityAwaiting Analysis

CVE-2025-64393

This vulnerability in Veeam Backup & Replication allows a Backup Viewer to execute arbitrary code as SYSTEM on the backup server.

CRITICAL 9.4EPSS 5.20%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (5.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

This vulnerability in Veeam Backup & Replication allows a Backup Viewer to execute arbitrary code as SYSTEM on the backup server.

CVSS 4.0
9.4 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS
5.20% probability · 92th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-502
Source
support@hackerone.com
EPSS trend
0%5%10%7 October 2026: 0.36%25 October 2026: 5.20%27 October 2026: 5.20%7 October 202627 October 2026

EPSS moved from 0.4% on 7 October 2026 to 5.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.