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Full vulnerability report · 2021
CVE-2021-1718High confidence

Microsoft SharePoint Server Tampering Vulnerability

Microsoft · Microsoft SharePoint Foundation 2010 Service Pack 2

8.0HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 2.59% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Microsoft SharePoint Foundation 2010 Service Pack 2 and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

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

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

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-2021-7185

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

Microsoft SharePoint Server Tampering Vulnerability

What

Microsoft SharePoint Server Tampering Vulnerability

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Microsoft SharePoint Server Tampering Vulnerability

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

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 → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
Required interaction required
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.
CWE not yet assigned
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:L/UI:R/S:U/C:H/I:H/A:H/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.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
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.
Network
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20210113Security Bulletin 13 Jan 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 13 Jan 2021, published on 13 January 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-026Multiples vulnérabilités dans Microsoft Office

De multiples vulnérabilités ont été corrigées dans Microsoft Office . Elles permettent à un attaquant de provoquer un contournement de la fonctionnalité de sécurité, une exécution de code à distance, une usurpation d'identité et une élévation de privilèges.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-001052Microsoft SharePoint Foundation における改ざんされる脆弱性

Microsoft SharePoint Foundation には、Microsoft SharePoint Server に不備があるため、改ざんされる脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5257MS 1월 보안 위협에 따른 정기 보안 업데이트 권고

실행 취약성 Microsoft Edge (HTML-based) CVE-2021-1705 Microsoft Edge(HTML 기반) 메모리 손상 취약성 Microsoft Graphics Component CVE-2021-1709 Windows Win32k 권한 상승 취약성 CVE-2021-1708 Windows GDI+ 정보 유출 취약성 CVE-2021-1696 Windows 그래픽 구성 요소 정보 유출 취약성 CVE-2021-1665 GDI+ 원격 코드 실행 취약성 Microsoft Malware Protection Engine CVE-2021-1647 Microsoft Defender 원격 코드 실행 취약성 Microsoft Office CVE-2021-1716 Microsoft Word 원격 코드 실행 취약성 CVE-2021-1715 Microsoft Word 원격 코드 실행 취약성 CVE-2021-1714 Microsoft Excel 원격 코드 실행 취약성 CVE-2021-1713 Microsoft Excel 원격 코드 실행 취약성 CVE-2021-1711 Microsoft Office 원격 코드 실행 취약성 Microsoft Office SharePoint CVE-2021-1719 Microsoft SharePoint 권한 상승 취약성 CVE-2021-1718 Microsoft SharePoint Server 변조 취약성 CVE-2021-1717 Microsoft SharePoint 스푸핑 취약성 Microsoft Office SharePoint CVE-2021-1712 Microsoft SharePoint 권한 상승 취약성 CVE-2021-1707 Microsoft SharePoint Server 원격 코드 실행 취약성 CVE-2021-1641 Microsoft SharePoint 스푸핑 취약성 Microsoft RPC CVE-2021-1702 Windows 원격 프로시저 호출 런타임 권한 상승 취약성 Microsoft Windows CVE-2021-1706 Windows LUAFV 런타임 권한 상승 취약성 CVE-2021-1699 Windows (modem.sys) Information Disclosure Vulnerability CVE-2021-1689 Windows Multipoint Management 권한 상승 취약성 CVE-2021-1676 Windows NT Lan Manager 데이터그램 수신기 드라이버 정보 유출 취약성 CVE-2021-1657 Windows 팩스 작성 양식 원격 코드 실행 취약성 CVE-2021-1650 Windows 런타임 C++ 템플릿 라이브러리 권한 상승 취약

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.
Fix not verified
Affected
Microsoft SharePoint Foundation 2010 Service Pack 2: 13.0.0 < publication
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
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 12 Jan 2021 · Last source change 19 Nov 2024, 15:25 UTC · CWE not yet assigned

CVE recordCVE.org · 5.1
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-2021-7185
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceUnavailable
NVD statusNVD modified after enrichment

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2021-7185↗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-2021-1718 · cve.blacktree.nl