What is the CVSS score of CVE-2026-21670?

CVE-2026-21670 has a CVSS 3.1 base score of 7.7 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Veeam Backup Replication are affected by CVE-2026-21670?

CVE-2026-21670 allows low-privileged users to extract saved SSH credentials from affected systems, creating a critical pathway for lateral movement and unauthorized access across your infrastructure.

How to fix or mitigate CVE-2026-21670?

Within 24 hours: Identify all systems running the vulnerable software and assess which contain SSH credentials; restrict local access to affected systems where possible and review user access logs. Within 7 days: Implement compensating controls including credential rotation for all SSH keys stored on vulnerable systems, disable SSH credential caching if available, and enforce network segmentation to limit lateral movement. Within 30 days: Develop and execute a migration strategy to transition users to patched versions or alternative products; establish continuous monitoring for unauthorized credential access attempts.

Veeam Backup Replication CVE-2026-21670

HIGH

Insufficiently Protected Credentials (CWE-522)

2026-03-12 support@hackerone.com

Information Disclosure Veeam Backup Replication

7.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.7 HIGH

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 19:57 vuln.today

CVE Published

Mar 12, 2026 - 15:16 nvd

HIGH 7.7

DescriptionCVE.org

A vulnerability allowing a low-privileged user to extract saved SSH credentials.

AnalysisAI

Unauthorized SSH credential extraction affects systems where low-privileged users can access stored authentication material, enabling account compromise without administrative access. The network-accessible vulnerability requires valid user credentials to exploit but impacts the entire system's security posture by exposing sensitive SSH keys. No patch is currently available to remediate this issue.