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PatchSiren cyber security CVE debrief

CVE-2024-40711 Veeam CVE debrief

CVE-2024-40711 is a deserialization vulnerability in Veeam Backup & Replication that CISA added to its Known Exploited Vulnerabilities catalog on 2024-10-17. CISA also marks it as having known ransomware campaign use. Because it is a KEV-listed issue, defenders should treat it as urgent and follow vendor mitigation guidance immediately, or discontinue use if mitigations are not available.

Vendor
Veeam
Product
Backup & Replication
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2024-10-17
Original CVE updated
2024-10-17
Advisory published
2024-10-17
Advisory updated
2024-10-17

Who should care

Veeam Backup & Replication administrators, backup and infrastructure teams, SOC and incident response personnel, and any organization that relies on Veeam-managed backups or recovery workflows.

Technical summary

The supplied corpus identifies the issue as a deserialization vulnerability affecting Veeam Backup & Replication. The corpus does not provide exploit mechanics, impacted versions, or a vendor patch bulletin, so the safest evidence-based summary is limited to the KEV designation and the CISA-directed response: apply mitigations per vendor instructions, or discontinue use if mitigations are unavailable.

Defensive priority

High. CISA KEV listing plus known ransomware campaign use makes this an urgent remediation item, especially for exposed or internet-reachable backup management systems.

Recommended defensive actions

  • Inventory all Veeam Backup & Replication deployments and confirm whether any instance is affected.
  • Review the vendor mitigation guidance referenced by CISA and apply it immediately.
  • If mitigations are unavailable for your environment, follow CISA guidance to discontinue use of the product until risk is reduced.
  • Prioritize remediation before the CISA KEV due date of 2024-11-07.
  • Monitor backup administration systems for unusual authentication, configuration, or job activity.
  • Restrict access to backup management interfaces and ensure they are not broadly exposed.

Evidence notes

Evidence comes from the CISA KEV entry and supplied timeline fields. CISA identifies the vulnerability as a Veeam Backup & Replication deserialization issue, sets dateAdded to 2024-10-17, dueDate to 2024-11-07, and flags knownRansomwareCampaignUse as Known. The supplied CISA metadata also directs organizations to apply vendor mitigations per instructions or discontinue use if mitigations are unavailable. The corpus does not include vendor advisory text, affected-version details, or CVSS data.

Official resources

Publicly disclosed in the CVE record on 2024-10-17 and added to CISA’s Known Exploited Vulnerabilities catalog the same day.