Skip to content
VulniPulse
Sign in
Critical 1 vendor · 2 advisories

CVE-2026-21666

CVE-2026-21666 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-2026-21666; each belongs to its advisory, not to every product listed. How records are collected and checked.

Vendor advisories for CVE-2026-21666

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

More Veeam advisories

All Veeam advisories

Get an email when Veeam publishes the next one.

See Veeam's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Veeam

iPhone and Android apps · New on the App Store

Monitor future Veeam CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery
Download on the App StoreGet CVE alerts on AndroidSee app features