BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2020
CVE-2020-17128High confidence

Microsoft Excel Remote Code Execution Vulnerability

Microsoft · Microsoft 365 Apps for Enterprise

7.8HighCVSS 3.1
Recommended action
Within 7 days

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

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-2020-9083

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.

Patch available
01

What, why and how

Microsoft Excel Remote Code Execution Vulnerability

What

Microsoft Excel Remote Code Execution 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 local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Microsoft Excel Remote Code Execution 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 local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

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
local access → vulnerable operation → execute code or commands in the affected security context
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
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:L/AC:L/PR:N/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.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing 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
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
UnauthenticatedRemote code execution
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-20201216Security Bulletin 16 Dec 2020

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 16 Dec 2020, published on 16 December 2020. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-808Multiples vulnérabilités dans les produits Microsoft

R/security-guidance Référence CVE CVE-2020-16971 https://www.cve.org/CVERecord?id=CVE-2020-16971 Référence CVE CVE-2020-17002 https://www.cve.org/CVERecord?id=CVE-2020-17002 Référence CVE CVE-2020-17117 https://www.cve.org/CVERecord?id=CVE-2020-17117 Référence CVE CVE-2020-17119 https://www.cve.org/CVERecord?id=CVE-2020-17119 Référence CVE CVE-2020-17123 https://www.cve.org/CVERecord?id=CVE-2020-17123 Référence CVE CVE-2020-17124 https://www.cve.org/CVERecord?id=CVE-2020-17124 Référence CVE CVE-2020-17125 https://www.cve.org/CVERecord?id=CVE-2020-17125 Référence CVE CVE-2020-17126 https://www.cve.org/CVERecord?id=CVE-2020-17126 Référence CVE CVE-2020-17128 https://www.cve.org/CVERecord?id=CVE-2020-17128 Référence CVE CVE-2020-17129 https://www.cve.org/CVERecord?id=CVE-2020-17129 Référence CVE CVE-2020-17130 https://www.cve.org/CVERecord?id=CVE-2020-17130 Référence CVE CVE-2020-17131 https://www.cve.org/CVERecord?id=CVE-2020-17131 Référence CVE CVE-2020-17132 https://www.cve.org/CVERecord?id=CVE-2020-17132 Référence CVE CVE-2020-17133 https://www.cve.org/CVERecord?id=CVE-2020-17133 Référence CVE CVE-2020-17135 https://www.cve.org/CVERecord?id=CVE-2020-17135 Référence CVE CVE-2020-17141 https://www.cve.org/CVERecord?id=CVE-2020-17141 Référence CVE CVE-2020-17142 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-806Multiples 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 élévation de privilèges, une exécution de code à distance, une atteinte à la confidentialité des données et une usurpation d'identité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-010330Microsoft Excel におけるリモートでコードを実行される脆弱性

Microsoft Excel には、リモートでコードを実行される脆弱性が存在します。 本脆弱性は、CVE-2020-17122、CVE-2020-17123、CVE-2020-17125、CVE-2020-17128、CVE-2020-17129 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-010329複数の Microsoft 製品におけるリモートでコードを実行される脆弱性

Microsoft 365 Apps、Excel、Office には、Microsoft Excel に不備があるため、リモートでコードを実行される脆弱性が存在します。 本脆弱性は、CVE-2020-17122、CVE-2020-17123、CVE-2020-17127、CVE-2020-17128、CVE-2020-17129 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-010328複数の Microsoft 製品におけるリモートでコードを実行される脆弱性

Microsoft 365 Apps、Excel、Office には、Microsoft Excel に不備があるため、リモートでコードを実行される脆弱性が存在します。 本脆弱性は、CVE-2020-17122、CVE-2020-17125、CVE-2020-17127、CVE-2020-17128、CVE-2020-17129 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-010327Microsoft Office および SharePoint Server におけるリモートでコードを実行される脆弱性

Microsoft Office および SharePoint Server には、Microsoft Excel に不備があるため、リモートでコードを実行される脆弱性が存在します。 本脆弱性は、CVE-2020-17123、CVE-2020-17125、CVE-2020-17127、CVE-2020-17128、CVE-2020-17129 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-010249複数の Microsoft 製品におけるリモートでコードを実行される脆弱性

Microsoft 365 Apps、Excel、Office には、Microsoft Excel に不備があるため、リモートでコードを実行される脆弱性が存在します。 本脆弱性は、CVE-2020-17122、CVE-2020-17123、CVE-2020-17125、CVE-2020-17127、CVE-2020-17128 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-010248複数の Microsoft 製品におけるリモートでコードを実行される脆弱性

Microsoft 365 Apps、Excel、Office には、Microsoft Excel に不備があるため、リモートでコードを実行される脆弱性が存在します。 本脆弱性は、CVE-2020-17122、CVE-2020-17123、CVE-2020-17125、CVE-2020-17127、CVE-2020-17129 とは異なる脆弱性です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5239MS 12월 보안 위협에 따른 정기 보안 업데이트 권고

soft Exchange 원격 코드 실행 취약점 CVE-2020-17141 Microsoft Exchange 원격 코드 실행 취약점 CVE-2020-17142 Microsoft Exchange 원격 코드 실행 취약점 CVE-2020-17143 Microsoft Exchange 정보 유출 취약점 CVE-2020-17144 Microsoft Exchange 원격 코드 실행 취약점 Microsoft Graphics Component CVE-2020-17098 Windows GDI+ 정보 유출 취약점 CVE-2020-17137 DirectX Graphics 커널 권한 상승 취약점 Microsoft Office CVE-2020-17119 Microsoft Outlook 정보 유출 취약점 CVE-2020-17122 Microsoft Excel 원격 코드 실행 취약점 CVE-2020-17123 Microsoft Excel 원격 코드 실행 취약점 CVE-2020-17124 Microsoft PowerPoint 원격 코드 실행 취약점 CVE-2020-17125 Microsoft Excel 원격 코드 실행 취약점 CVE-2020-17126 Microsoft Excel 정보 유출 취약점 CVE-2020-17127 Microsoft Excel 원격 코드 실행 취약점 CVE-2020-17128 Microsoft Excel 원격 코드 실행 취약점 CVE-2020-17129 Microsoft Excel 원격 코드 실행 취약점 CVE-2020-17130 Microsoft Excel 보안 기능 우회 취약점 Microsoft Office SharePoint CVE-2020-17089 Microsoft SharePoint 권한 상승 취약점 CVE-2020-17115 Microsoft SharePoint 스푸핑 취약점 CVE-2020-17118 Microsoft SharePoint 원격 코드 실행 취약점 CVE-2020-17120 Microsoft SharePoint 정보 유출 취약점 CVE-2020-17121 Microsoft SharePoint 원격 코드 실행 취약점 Microsoft Windows CVE-2020-16996 Kerberos 보안 기능 우회 취약점 CVE-2020-17092 Windows 네트워크 연결 서비스 권한 상승 취약점 CVE-2020-17103 Windows 클라우드 파일 미니 필터 드라이버 권한 상승 취약점 CVE-2020-17134 Windows 클라우드 파일 미니 필터 드라이버 권한 상승 취약점 CVE-2020-17136 Windows 클라우드 파일 미니 필터 드라이버 권한 상승 취약점 CVE-2020-17138

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. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 9 Dec 2020 · Last source change 9 Jun 2026, 18:08 UTC · CWE not yet assigned

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-2020-9083
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
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2020-9083↗Patch or update reference↗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-2020-17128 · cve.blacktree.nl