CVE-2023-21777
📛 CVE Title
Azure App Service on Azure Stack Hub Elevation of Privilege Vulnerability
Description
Azure App Service on Azure Stack Hub Elevation of Privilege Vulnerability
Overview
- State
- PUBLISHED
- Assigner (CNA)
- microsoft
- CVSS severity
- HIGH
- CVSS score
- 8.7 / 10
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C- Effective score
- 8.7 / 10 HIGH source: CNA overview
- MSRC score
- 8.7 / 10 HIGH MS rating: Important · Elevation of Privilege
- CWE(s)
-
CWE-284 - Reserved
- 2022-12-16
- Published
- 2023-02-14 08:00 UTC
- Last updated
- 2023-02-14 08:00 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/21xxx/CVE-2023-21777.json
- Linked Threat
- CVE-2023-21777 — Azure App Service on Azure Stack Hub Elevation of Privilege Vulnerability
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2023-02-14 20:15:14 UTC
- NVD last modified
- 2026-06-17 05:33:57 UTC
- NVD CVSS v3.1
- 8.7 / 10 HIGH source: secure@microsoft.com
- NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L- Exploitability subscore
- 2.0 / 10
- Impact subscore
- 6.0 / 10
- EPSS score
- 0.0035 (probability of exploitation in next 30 days)
- EPSS percentile
- 27.50% vs all CVEs — higher = more likely to be exploited, as of 2026-07-31
NVD-assigned CWE(s):
CWE-284,
CWE-269
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-08-01 12:31 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2023-25944 - Assigner
- microsoft
- Published
- Feb 14, 2023, 7:32:37 PM
- Updated
- Jan 1, 2025, 12:40:41 AM
- EUVD base score (CVSS 3.1)
-
8.7 / 10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C - EUVD-reported EPSS
- 0.5000
- Vendors
- Microsoft
- Products
-
Azure App Service on Azure Stack Hub (98.0.0 <98.0.1.703)
- Aliases
-
GHSA-462g-m6hg-7643
ENISA description: Azure App Service on Azure Stack Hub Elevation of Privilege Vulnerability
EUVD references (1)
Microsoft Security Response Center MSRC
Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-11 01:49 UTC (source: CVRF).
- MS severity
- Important
- Impact
- Elevation of Privilege
- MS CVSS base score
- 8.7 / 10 (temporal 7.6)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C - Exploit assessment
- Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;DOS:N/A
- Release
- 2023-Feb
Microsoft remediations / KB articles (1)
- Release Notes — Vendor Fix / App Service Installer (fixed build 98.0.1.703)
Microsoft FAQ (3)
According to the CVSS metrics, the attack vector is local (AV:L) and privilege required is low (PR:L). What does that mean for this vulnerability?
An attacker must have access to the targeted worker role and the ability to deploy a malicious application within the worker. The attack itself is carried out locally on the worker role where a malicious application has been deployed.
According to the CVSS metric, successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?
This vulnerability could lead to the attacker gaining the ability to interact with other tenant’s applications and content.
According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H) and major loss of integrity (I:H) but have low effect on availability (A:L). What does that mean for this vulnerability?
Exploiting this vulnerability could enable an attacker with the ability to access and modify content of a targeted application or workload leading to major loss of confidentiality and integrity. The attacker cannot fully deny service availability across all infrastructure, hence low effect on availability.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Microsoft | Azure App Service on Azure Stack Hub |
98.0.0 (affected)
|
Unknown |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:microsoft:azure_app_service_on_azure_stack:-:*:*:*:*:*:*:*
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (2)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21777 secure@microsoft.com PatchRelease NotesVendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21777 af854a3a-2127-422b-91ae-364da2661108 PatchRelease NotesVendor Advisory
Remediations (15)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:windowsforum.com
Timeline — patch , problem, mitigation , fix January 13, 2026 — Microsoft released the January cumulative update (KB5073455) for Windows 11, version 23H2. The package included multiple security and servicing fixes. January 13-16, 2026 — Administrators and users began reporting restart‑on‑shutdown and failed hibernation behavior on devices with Secure Launch enabled; community ...
2026-06-04 11:14 UTC -
web:learn.microsoft.com
As of November 11, 2025, Home and Pro editions of Windows 11, version 23H2 have reached end of servicing. Enterprise and Education editions of version 23H2 will continue to receive monthly security updates until November 10, 2026.
2026-06-04 11:14 UTC -
web:support.microsoft.com
The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change. [Networking] Fixed: This update addresses a security issue in the Windows Routing and Remote Access Service (RRAS) management tool. If you connect to a malicious remote server, an attacker could disrupt the tool or run code on your device. For more ...
2026-06-04 11:14 UTC -
web:www.rapid7.com
Microsoft is publishing 77 vulnerabilities this Patch Tuesday, including two publicly disclosed zero-day vulnerabilities.
2026-06-04 11:14 UTC -
web:support.microsoft.com
Updates for Windows 11, version 24H2 Windows 11 is a service, which means it gets better through periodic feature updates. We take a phased and measured approach to rolling out every feature update. That means you'll receive Windows 11, version 24H2 when data shows that your device is ready and that you will have a great update experience. On the left side of this page, you'll find a list ...
2026-06-04 11:14 UTC -
web:www.neowin.net
Windows 11's March 2026 Patch Tuesday update is here under KB5079473 with File Explorer improvements and more.
2026-05-22 05:46 UTC -
web:www.ninjaone.com
Catalog of Microsoft KB updates with insights on performance & user sentiment. Find out what's working, what's not, & make informed decisions.
2026-05-22 05:46 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-22 05:46 UTC -
web:www.pcworld.com
Windows 11's Secure Boot fix update finally rolls out to more PCs Important security certificates for Windows 11 will soon expire for many users.
2026-05-22 05:46 UTC -
web:cyberpress.org
The third vulnerability, CVE -2026-44791 (GHSA-wrwr-h859-xh2r), is particularly alarming because it represents a patch bypass. It circumvents the previously issued fix for GHSA-hqr4-h3xv-9m3r in the XML node, reintroducing prototype pollution through a different code path. When chained with additional nodes, this too can escalate to RCE on the host.
2026-05-22 05:46 UTC -
web:www.windowslatest.com
Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.
2026-05-22 05:46 UTC -
web:cybersecuritynews.com
Microsoft released an out-of-band hotpatch update on March 13, 2026, addressing serious security vulnerabilities in Windows 11 versions 24H2 and 25H2.
2026-05-22 05:46 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-22 05:46 UTC -
web:www.bleepingcomputer.com
Microsoft has released Windows 11 KB5079473 and KB5078883 cumulative updates for versions 25H2/24H2 and 23H2 to fix security vulnerabilities, bugs, and add new features.
2026-05-22 05:46 UTC -
web:www.computerworld.com
Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...
2026-05-22 05:46 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2023-21777.json.
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