---
id: "CVE-2024-40711"
kind: "vulnerability"
aliases: ["CVE-2024-40711"]
title: "veeam backup \\& replication: A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code\u2026"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Veeam Backup & Replication", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "veeam backup \\& replication", "fixed": ["12.2.0.334"], "affected": ">= 12.0.0.1420, < 12.2.0.334", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["backup-server", "exploited", "infrastructure", "ransomware", "veeam", "windows"]
not_affected_if: ["unknown"]
published_at: "2024-09-07T17:15:13+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-40711", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40711", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# veeam backup \& replication: A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code…

Veeam Backup and Replication has a deserialization flaw that lets an unauthenticated remote attacker run code on the backup server. CISA lists it as exploited in the wild, with ransomware use tagged.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Veeam Backup & Replication affected ? fixed ?
- vendor:veeam backup \& replication affected >= 12.0.0.1420, < 12.2.0.334 fixed 12.2.0.334

## Fix

Apply the Veeam mitigation or patch per vendor instructions; the sources do not name the fixed build.
If no mitigation is available, CISA says to discontinue use of the product.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-40711
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2024-40711

## From the sources

Veeam Backup and Replication contains a deserialization vulnerability allowing an unauthenticated user to perform remote code execution.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_