Veeam Backup & Replication Updates Fix Four Security Flaws
Tech GuruQuick Answer
Veeam KB4948 fixes four vulnerabilities across Backup & Replication 13 and managed Agent for Linux 13.1. Inventory exact builds and deployment types, install the supported fixed branch, validate backup and restore workflows, and retain evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Inventory Backup & Replication servers and appliances, CDP Coordinator exposure, NAS restore operators, managed Linux agents, exact builds, owners, and maintenance windows. Apply Veeam's branch and role prerequisites separately; do not extend the affected range to versions that the authority explicitly lists as unaffected. Install Backup & Replication 13.1.2.57 or 13.0.3.63 and managed Agent for Linux 13.1.2.11, as applicable. Confirm running builds, test CDP, NAS restore and managed-agent workflows, review authorization and restore activity where warranted, verify jobs and repositories, and retain evidence.
Last verified: 2026-10-27 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Veeam Backup & Replication 13 and managed Veeam Agent for Linux 13.1 |
|---|---|
| Advisory | KB4948 |
| CVEs | CVE-2026-105477, CVE-2026-108140, CVE-2026-108141, CVE-2026-108142 |
| Authoritative release date | 2026-10-27 00:00:00 UTC |
| Authority revision date | 2026-10-27 00:00:00 UTC |
| Affected versions | Veeam Backup & Replication 13.1.1.18 and earlier 13.1 builds, 13.0.2.29 and earlier 13.0 builds; managed Veeam Agent for Linux 13.1.1.4 and earlier 13.1 builds. Veeam says the specified older branches are not affected. |
| Fixed version | Veeam Backup & Replication 13.1.2 build 13.1.2.57 or 13.0.3 build 13.0.3.63; Veeam Agent for Linux 13.1.2 build 13.1.2.11 |
| CVSS base score | 5.9 to 9.1 (CVSS v4.0) |
| CVSS severity | Medium to Critical |
| Exploitation status | Veeam does not state that these vulnerabilities are being maliciously exploited.; no exploitation claim is inferred. |
What Changed
Veeam fixed unauthenticated CDP Coordinator authorization bypass, two NAS restore path-traversal issues, and local privilege escalation in managed Agent for Linux deployments.
What To Validate Now
- Inventory. Inventory Backup & Replication servers and appliances, CDP Coordinator exposure, NAS restore operators, managed Linux agents, exact builds, owners, and maintenance windows.
- Establish applicability. Apply Veeam's branch and role prerequisites separately; do not extend the affected range to versions that the authority explicitly lists as unaffected.
- Remediate. Install Backup & Replication 13.1.2.57 or 13.0.3.63 and managed Agent for Linux 13.1.2.11, as applicable.
- Validate. Confirm running builds, test CDP, NAS restore and managed-agent workflows, review authorization and restore activity where warranted, verify jobs and repositories, and retain evidence.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
The critical issue targets the CDP Coordinator, while the restore flaws require a Restore Operator and controlled NAS content. Preserve those distinct preconditions during prioritization.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
