What is CVE-2024-40711?
A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).
The record classifies CVE-2024-40711 under weakness class CWE-502. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 763 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 90.3% probability of exploitation in the next 30 days, higher than 99.7% of all scored CVEs
- CISA KEV
- Listed since 2024-10-17, federal remediation deadline 2024-11-07 — used in known ransomware campaigns
- Threadlinqs priority
- 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
- Published
- 2024-09-07, last modified 2025-10-21
Is CVE-2024-40711 being exploited?
CISA added CVE-2024-40711 to the Known Exploited Vulnerabilities catalog on 2024-10-17, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2024-11-07 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2024-40711 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2024/CVE-2024-40711.yaml). It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
- watchtowrlabs/CVE-2024-40711 (github)
- realstatus/CVE-2024-40711-Exp (github)
- trickest/cve (trickest)
Affected products and versions
- Veeam: Backup & Replication
How to fix CVE-2024-40711
Vendor advisory: https://www.veeam.com/kb4649. Because CVE-2024-40711 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2024-11-07. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2024-40711
3 tracked threats in the Threadlinqs corpus reference CVE-2024-40711, either in the campaign’s CVE list or as an indicator on the campaign record.
- Healthcare Sector Ransomware Targeting and Expanding Attack Surface (Qilin, Akira, DragonForce, LockBit, The Gentlemen) — HIGH · 2026-10-09
- The First 24 Hours of a Ransomware Intrusion: Exfiltration, Credential Theft and Backup Targeting (Akira, REDBIKE, AGENDA) — HIGH · 2026-10-03
- AI-Augmented FortiGate Mass Exploitation — Russian-Speaking Actor Breaches 600+ Firewalls Across 55 Countries Using LLM-Generated Tooling and Custom MCP Framework — CRITICAL · 2026-02-22
Sources
Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on .