What is CVE-2026-21522?
Improper neutralization of special elements used in a command ('command injection') in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.
The record classifies CVE-2026-21522 under weakness class CWE-77. Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-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 260 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 6.7 — MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 0.4% probability of exploitation in the next 30 days, higher than 36.5% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 4.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-02-10, last modified 2026-08-19
Is CVE-2026-21522 being exploited?
It currently carries a trending score of 19 in the Threadlinqs vulnerability feed.
Affected products and versions
- Microsoft: Confcom
How to fix CVE-2026-21522
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21522. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-21522
2 tracked threats in the Threadlinqs corpus reference CVE-2026-21522, either in the campaign’s CVE list or as an indicator on the campaign record.
- February 2026 Patch Tuesday: Six Zero-Days Among 59 CVEs — CrowdStrike-Discovered RDP EoP Exploited Since December 2025 — CRITICAL · 2026-02-12
- February 2026 Patch Tuesday: Six Zero-Days Among 59 CVEs — CRITICAL · 2026-02-12
Sources
Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .