CVE-2026-21667 (GCVE-0-2026-21667)
Vulnerability from cvelistv5 – Published: 2026-03-12 15:09 – Updated: 2026-03-13 03:55Summary
A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-12 00:00 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.veeam.com/kb4830 |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Veeam | Backup and Replication |
Unaffected:
12.3.2 , < 12.3.2
(semver)
|
guessed |
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: d77923d2-8fa1-4972-a5bc-32ee3688a2e9
Exploited: Yes
Timestamps
First Seen: 2026-03-13
Asserted: 2026-03-13
Scope
Notes: KEVIntel entry: A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server. | Affected: Veeam / Backup and Replication | CVSS: 10.0 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server. |
| Vendor | Veeam |
| Product | Backup and Replication |
| Added Date | 2026-03-13T16:26:50.000Z |
| Cvss Score | 10.0 |
| Epss Score | None |
| Cvss Severity | CRITICAL |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | True |
References
Created: 2026-06-19 12:42 UTC
| Updated: 2026-06-19 12:42 UTC
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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