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Full vulnerability report · 2023
CVE-2023-21699High confidence

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

Microsoft · Windows 10 Version 1507

5.3MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-25866

No EUVD known-exploited evidence

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
5.3 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

What

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Out-of-bounds Read → obtain information outside the intended access boundary
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-125
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2023-25866Official EUVD mapping

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

Official EUVD record ↗
Cyber Security Agency of Singapore · English · CSA-SB-20230215Security Bulletin 15 Feb 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 15 Feb 2023, published on 15 February 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0130Multiples vulnérabilités dans Microsoft Windows

février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21692 Bulletin de sécurité Microsoft CVE-2023-21693 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21693 Bulletin de sécurité Microsoft CVE-2023-21694 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21694 Bulletin de sécurité Microsoft CVE-2023-21695 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21695 Bulletin de sécurité Microsoft CVE-2023-21697 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21697 Bulletin de sécurité Microsoft CVE-2023-21699 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21699 Bulletin de sécurité Microsoft CVE-2023-21700 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21700 Bulletin de sécurité Microsoft CVE-2023-21701 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21701 Bulletin de sécurité Microsoft CVE-2023-21702 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21702 Bulletin de sécurité Microsoft CVE-2023-21797 du 14 février 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21797 Bulletin de sécurité Micr

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001289Microsoft Windows 10 および Windows Server における情報を公開される脆弱性

Microsoft Windows 10 および Windows Server には、Windows Internet Storage Name Service (iSNS) サーバに不備があるため、情報を公開される脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5870MS 2월 보안 위협에 따른 정기 보안 업데이트 권고

Server 원격 코드 실행 취약점 Microsoft Exchange Server CVE-2023-21707 Microsoft Exchange Server 원격 코드 실행 취약점 Microsoft Exchange Server CVE-2023-21706 Microsoft Exchange Server 원격 코드 실행 취약점 SQL Server CVE-2023-21705 Microsoft SQL Server 원격 코드 실행 취약점 SQL Server CVE-2023-21704 SQL Server용 Microsoft ODBC 드라이버 원격 코드 실행 취약점 Azure Data Box Gateway CVE-2023-21703 Azure Data Box Gateway 원격 코드 실행 취약점 Windows iSCSI CVE-2023-21702 Windows iSCSI 서비스 서비스 거부 취약점 Windows Protected EAP (PEAP) CVE-2023-21701 Microsoft PEAP(Protected Extensible Authentication Protocol) 서비스 거부 취약점 Windows iSCSI CVE-2023-21700 Windows iSCSI 검색 서비스 서비스 거부 취약점 Internet Storage Name Service CVE-2023-21699 Windows iSNS(Internet Storage Name Service) 서버 정보 노출 취약점 Internet Storage Name Service CVE-2023-21697 Windows iSNS(Internet Storage Name Service) 서버 정보 노출 취약점 Windows Protected EAP (PEAP) CVE-2023-21695 Microsoft PEAP(Protected Extensible Authentication Protocol) 원격 코드 실행 취약점 Windows Fax and Scan Service CVE-2023-21694 Windows 팩스 서비스에서 발생하는 원격 코드 실행 취약점 Microsoft PostScript Printer Driver CVE-2023-21693 Microsoft PostScript 프린터 드라이버 정보 유출 취약점 Windows Protected EAP (PEAP) CVE-2023-21692 Microsoft PEAP(Protected Extensible Authentication Protocol) 원격 코드 실행 취약점 Windows Protected EAP (PEAP) CVE-2023-21691 Microsoft PEAP(Protected Extensible Auth

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 14 Feb 2023 · Last source change 19 Aug 2026, 16:27 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-25866
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    10.0.17763.0 < 10.0.17763.4010; 10.0.0 < 10.0.17763.4010; 10.0.0 < 10.0.19042.2604; 10.0.19043.0 < 10.0.19044.2604; 10.0.19045.0 < 10.0.19045.2604; 10.0.10240.0 < 10.0.10240.19747 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    10.0.10240.0 < 10.0.10240.19747; 10.0.14393.0 < 10.0.14393.5717; 10.0.17763.0 < 10.0.17763.4010; 10.0.0 < 10.0.17763.4010; 10.0.0 < 10.0.19042.2604; 10.0.19043.0 < 10.0.19044.2604; 10.0.19045.0 < 10.0.19045.2604; 6.0.6003.0 < 6.0.6003.21915 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2023-25866↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-21699 · cve.blacktree.nl