Azure Service Fabric Container Elevation of Privilege Vulnerability

published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-25699

cvss: 7.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

Patch / fix

fixed in 3

Microsoft Azure Service Fabric 8.2 8.2 CU8
Microsoft Azure Service Fabric 9.0 for Linux 9.0 CU5
Microsoft Azure Service Fabric 9.1 9.1 CU1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-07-03)

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Azure Service Fabric 8.2
Microsoft Azure Service Fabric 9.0 for Linux
Microsoft Azure Service Fabric 9.1

Classification

Weakness

CWE-284 Improper Access Control
CWE-269 Improper Privilege Management

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2023-21531
vendor-advisory

Sources

CVE List CVE-2023-21531
NVD CVE-2023-21531

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