Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability

published 2026-03-05 8 mo ago modified 2026-06-19 4 mo ago also EUVD-2026-9889

cvss: 6.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

'.../...//' in Azure Compute Gallery allows an authorized attacker to elevate privileges locally.

Patch / fix

links 1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26124 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 8 mo ago (2026-03-09)

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.7	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA	3.1	6.7	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Microsoft ACI Confidential Containers

Classification

Weakness

CWE-35 Path Traversal: '.../...//'
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2026-26124
vendor-advisory, patch

Sources

CVE List CVE-2026-26124
NVD CVE-2026-26124

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary