What is CVE-2026-21672?
A vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.
The record classifies CVE-2026-21672 under weakness class CWE-538. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 234 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 0.2% probability of exploitation in the next 30 days, higher than 12.8% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 4.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-03-12, last modified 2026-05-10
Is CVE-2026-21672 being exploited?
It currently carries a trending score of 8 in the Threadlinqs vulnerability feed.
Affected products and versions
- Veeam: Backup and Replication
How to fix CVE-2026-21672
The record marks a vendor fix as available for CVE-2026-21672. No patch URL is recorded on this row, so the fixed version has to be read from the vendor advisory in the sources below.
Threat activity tracking CVE-2026-21672
1 tracked threat in the Threadlinqs corpus references CVE-2026-21672, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .