Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function Vulnerability
Veeam Backup & Replication Cloud Connect component contains a missing authentication for critical function vulnerability that allows an unauthenticated user operating within the backup infrastructure network perimeter to obtain encrypted credentials stored in the configuration database. This may lead to an attacker gaining access to the backup infrastructure hosts.
- Vendor
- Veeam
- Product
- Backup & Replication
- CVSS
- 7.5
- EPSS (exploit probability)
- 80.6%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2023-27532 being exploited?
Yes. CISA added CVE-2023-27532 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild. CISA marks it as known to be used in ransomware campaigns.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 80.6% (scored October 21, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Veeam Backup & Replication CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2024-40711 Veeam Backup and Replication Deserialization Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 90.4% | |
| CVE-2022-26501 Veeam Backup & Replication Remote Code Execution Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 4.1% | |
| CVE-2022-26500 Veeam Backup & Replication Remote Code Execution Vulnerabilityransomware use | [ HIGH ] | 8.8 | 5.8% |