Security Digest · Vulnerability record · Known exploited
CVE-2024-40711: Veeam Backup and Replication Deserialization Vulnerability
Exploited in the wild (CISA KEV). A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).
CISA KEV · added 2024-10-17 CVSS 9.8 Critical EPSS 90.4% · p99.8 Act now
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Veeam Backup & Replication. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-10-17, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-11-07; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns.
- EPSS 90.4%, percentile 99.8: FIRST’s model estimates a 90.4% chance of exploitation activity in the next 30 days, higher than 99.8% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. Veeam Backup & Replication RCE (CVE-2024-40711) — Ransomware crews have used this to take over backup servers; any Veeam Backup & Replication v12 server below 12.2 is an emergency, and backup servers should never be reachable from user or internet networks.
What it is
A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).
CISA’s summary
Veeam Backup and Replication contains a deserialization vulnerability allowing an unauthenticated user to perform remote code execution.
Weakness type: CWE-502.
Product: Veeam Backup & Replication · Assigned by: hackerone · Published: 2024-09-07
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Veeam | Backup and Recovery | 12.1.2 <= 12.1.2 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| hackerone | 3.0 | 9.8 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2024-10-17; federal due date 2024-11-07. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 90.37% probability of exploitation activity in the next 30 days; percentile 99.8.
Timeline
- — erroneo.us brief: Veeam Backup & Replication RCE (CVE-2024-40711)
- — CVE record published by hackerone
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (veeam.com) veeam.com
Vulnerability records
- CVE.org record CVE-2024-40711 cve.org
- NVD entry CVE-2024-40711 nvd.nist.gov
Government
Other references from the CVE record and advisory
- labs.watchtowr.com labs.watchtowr.com
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