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CVE-2021-28458

24
FAUCET Score

CVE-2021-28458 is an Elevation of Privilege vulnerability affecting the Microsoft ms-rest-nodeauth library used in Azure. With a CVSS score of 7.8 (HIGH), it allows a local attacker to achieve high impact on confidentiality, integrity, and availability with low attack complexity. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.8CPE matchmatch criteria
cpe:2.3:a:microsoft:ms-rest-nodeauth:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.96%
Probability of exploitation in next 30 days
EPSS Percentile
78.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0196 is in the 96th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: @azure/ms-rest-nodeauth
View patch
npmpatch availablevia ghsa
Product: @azure/ms-rest-nodeauthFixed in: 3.0.8

Vendor Advisories (2)

npmGHSA-qpfw-4m9x-rxx8high

Improper Privilege Management in Azure ms-rest-nodeauth

May 24, 2022
microsoft2021-Apr/CVE-2021-28458Important

Azure ms-rest-nodeauth Library Elevation of Privilege Vulnerability

Apr 13, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-28458
PatchVendor Advisory