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Critical 1 vendor · 2 advisories

CVE-2026-21668

CVE-2026-21668 key facts

CISA KEV
Not listed (catalogue checked )
Highest advisory rating
Critical
Vendor advisories
2 from Veeam
Listed by VulniPulse
Record changed

Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-21668; each belongs to its advisory, not to every product listed. How records are collected and checked.

Vendor advisories for CVE-2026-21668

Veeam

2 advisories
  • Advisory severityCritical9.9

    Critical [CVE-2026-21666 +5] Veeam Backup & Replication: vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.

    CVE-2026-21672Source published Source updated

    This bulletin covers 6 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    A vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.

    Related products — impact not confirmed
    • Veeam Backup & Replication
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • 12.3.2.4465
    • 12.3.2
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin
  • Advisory severityUnrated

    Advisory [CVE-2021-35971 +51] List of Security Fixes and Improvements in Veeam Backup & Replication

    KB3103Source published

    This bulletin covers 52 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    List of Security Fixes and Improvements in Veeam Backup & Replication KB ID: 3103 Product: Published: 2020-03-02 Last Modified: 2026-10-20 Purpose 13.1.2.57 - @angular/core / common / compiler upgraded to version 21.2.20 - System. Security. Cryptography. Xml upgraded to version 10.0.10 - Microsoft. AspNetCore. Authentication. Negotiate upgraded to version 10.0.11 - decode-uri-component upgraded to version 0.5.0 - dompurify upgraded to version 3.4.15 - postcss upgraded to version 8.5.28 - OpenSSL upgraded to version 3.5.8 13.1.0.411 - CoreWCF.Primitives upgraded to version 1.8.1 - MailKit upgraded to version 4.17.0 - MimeKit upgraded to version 4.17.0 - OpenTelemetry upgraded to version 1.15.3 - SQLite upgraded to version 3.53.2 - curl upgraded to version 8.21.0 - zlib upgraded to version…

    Affected products in this advisory
    • Backup and Replication
    • Veeam Backup & Replication
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • Veeam Backup & Replication 13.1.2.57
    • Veeam Backup & Replication 13.1.0.411
    • Veeam Backup & Replication 13.0.3.63
    • Veeam Backup & Replication 13.0.2.29

    4 more entries in the full advisory.

    Mitigation guidance
    • Upgrade to Veeam Backup & Replication 13.1.2.57 or later, which contains the listed security fixes.
    Full advisory and evidenceOpen source bulletin

References

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