HighCVE-2021-28455

    Microsoft Jet Red Database Engine and Access Connectivity Engine Remote Code Execution Vulnerability (CVE-2021-28455)

    Published Sources: CVE.org

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    What is affected, what to do

    Microsoft Jet Red Database Engine and Access Connectivity Engine Remote Code Execution Vulnerability

    Update Microsoft Access 2013 Service Pack 1 (32-bit editions) to version 15.0.5353.1000, Microsoft Access 2013 Service Pack 1 (64-bit editions) to version 15.0.5353.1000, Microsoft Office 2016 to version 16.0.5161.1001.

    Affected
    • Microsoft Access 2013 Service Pack 1 (32-bit editions) lt 15.0.0..15.0.5353.1000
    • Microsoft Access 2013 Service Pack 1 (64-bit editions) lt 15.0.0..15.0.5353.1000
    • Microsoft Office 2019 gte 19.0.0..*
    • Microsoft 365 Apps for Enterprise gte 16.0.1..*
    • Microsoft Office 2016 lt 16.0.0..16.0.5161.1001
    • Microsoft Access 2016 (32-bit edition) gte 16.0.0..*
    • Microsoft Access 2016 (64-bit edition) gte 16.0.0..*
    • Microsoft Office 2013 Service Pack 1 lt 15.0.0..15.0.5345.1001
    • Microsoft Windows 10 Version 1803 lt 10.0.0..10.0.17134.2207
    • Microsoft Windows 10 Version 1809 lt 10.0.0..10.0.17763.1935
    • Microsoft Windows Server 2019 lt 10.0.0..10.0.17763.1935
    • Microsoft Windows Server 2019 (Server Core installation) lt 10.0.0..10.0.17763.1935
    • Microsoft Windows 10 Version 1909 lt 10.0.0..10.0.18363.1556
    • Microsoft Windows Server, version 1909 (Server Core installation) lt 10.0.0..10.0.18363.1556
    • Microsoft Windows 10 Version 2004 lt 10.0.0..10.0.19041.982
    • Microsoft Windows Server version 2004 lt 10.0.0..10.0.19041.982
    • Microsoft Windows 10 Version 20H2 lt 10.0.0..10.0.19042.982
    • Microsoft Windows Server version 20H2 lt 10.0.0..10.0.19042.982
    • Microsoft Windows 10 Version 1507 lt 10.0.0..10.0.10240.18931
    • Microsoft Windows 10 Version 1607 lt 10.0.0..10.0.14393.4401
    • Microsoft Windows Server 2016 lt 10.0.0..10.0.14393.4401
    • Microsoft Windows Server 2016 (Server Core installation) lt 10.0.0..10.0.14393.4401
    • Microsoft Windows 7 lt 6.1.0..6.1.7601.24597
    • Microsoft Windows 7 lt 6.1.0..6.1.7601.24598
    • Microsoft Windows 7 Service Pack 1 lt 6.1.0..6.1.7601.24597
    • Microsoft Windows 7 Service Pack 1 lt 6.1.0..6.1.7601.24598
    • Microsoft Windows 8.1 lt 6.3.0..6.3.9600.20017
    • Microsoft Windows Server 2008 Service Pack 2 lt 6.0.0..6.0.6003.21117
    • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) lt 6.0.0..6.0.6003.21117
    • Microsoft Windows Server 2008 R2 Service Pack 1 lt 6.1.0..6.1.7601.24597
    • Microsoft Windows Server 2008 R2 Service Pack 1 lt 6.1.0..6.1.7601.24598
    • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) lt 6.0.0..6.1.7601.24597
    • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) lt 6.0.0..6.1.7601.24598
    • Microsoft Windows Server 2012 lt 6.2.0..6.2.9200.23347
    • Microsoft Windows Server 2012 (Server Core installation) lt 6.2.0..6.2.9200.23347
    • Microsoft Windows Server 2012 R2 lt 6.3.0..6.3.9600.20017
    • Microsoft Windows Server 2012 R2 (Server Core installation) lt 6.3.0..6.3.9600.20017
    Fixed in
    • Microsoft Access 2013 Service Pack 1 (32-bit editions) 15.0.5353.1000
    • Microsoft Access 2013 Service Pack 1 (64-bit editions) 15.0.5353.1000
    • Microsoft Office 2016 16.0.5161.1001
    • Microsoft Office 2013 Service Pack 1 15.0.5345.1001
    • Microsoft Windows 10 Version 1803 10.0.17134.2207
    • Microsoft Windows 10 Version 1809 10.0.17763.1935
    • Microsoft Windows Server 2019 10.0.17763.1935
    • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.1935
    • Microsoft Windows 10 Version 1909 10.0.18363.1556
    • Microsoft Windows Server, version 1909 (Server Core installation) 10.0.18363.1556
    • Microsoft Windows 10 Version 2004 10.0.19041.982
    • Microsoft Windows Server version 2004 10.0.19041.982
    • Microsoft Windows 10 Version 20H2 10.0.19042.982
    • Microsoft Windows Server version 20H2 10.0.19042.982
    • Microsoft Windows 10 Version 1507 10.0.10240.18931
    • Microsoft Windows 10 Version 1607 10.0.14393.4401
    • Microsoft Windows Server 2016 10.0.14393.4401
    • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4401
    • Microsoft Windows 7 6.1.7601.24597
    • Microsoft Windows 7 6.1.7601.24598
    • Microsoft Windows 7 Service Pack 1 6.1.7601.24597
    • Microsoft Windows 7 Service Pack 1 6.1.7601.24598
    • Microsoft Windows 8.1 6.3.9600.20017
    • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21117
    • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.21117
    • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.24597
    • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.24598
    • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.24597
    • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.24598
    • Microsoft Windows Server 2012 6.2.9200.23347
    • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.23347
    • Microsoft Windows Server 2012 R2 6.3.9600.20017
    • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20017

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    8.8

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    8.8

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: CVE.org

    2.1 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 82.0

    Show all metrics
    Severity
    High
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    97.77 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    8.8 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    8.8
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    2.1 %
    Moderate — model estimates 1-10% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    82.0
    Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    Microsoft Jet Red Database Engine and Access Connectivity Engine Remote Code Execution Vulnerability

    Source: NVD (NIST), cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    MicrosoftMicrosoft 365 Apps for Enterprise
    • ≥ 16.0.1
    • —
    MicrosoftMicrosoft Access 2013 Service Pack 1 (32-bit editions)
    • 15.0.0 – < 15.0.5353.1000
    • 15.0.5353.1000
    MicrosoftMicrosoft Access 2013 Service Pack 1 (64-bit editions)
    • 15.0.0 – < 15.0.5353.1000
    • 15.0.5353.1000
    MicrosoftMicrosoft Access 2016 (32-bit edition)
    • ≥ 16.0.0
    • —
    MicrosoftMicrosoft Access 2016 (64-bit edition)
    • ≥ 16.0.0
    • —
    MicrosoftMicrosoft Office 2013 Service Pack 1
    • 15.0.0 – < 15.0.5345.1001
    • 15.0.5345.1001
    MicrosoftMicrosoft Office 2016
    • 16.0.0 – < 16.0.5161.1001
    • 16.0.5161.1001
    MicrosoftMicrosoft Office 2019
    • ≥ 19.0.0
    • —
    microsoft365_apps
    • —
    • —
    microsoftoffice
    • 2013
    • 2016
    • 2019
    • —
    • —
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    WindowsMicrosoftWindows 10 Version 150710.0.10240.18931
    WindowsMicrosoftWindows 10 Version 160710.0.14393.4401
    WindowsMicrosoftWindows 10 Version 180310.0.17134.2207
    WindowsMicrosoftWindows 10 Version 180910.0.17763.1935
    WindowsMicrosoftWindows 10 Version 190910.0.18363.1556
    WindowsMicrosoftWindows 10 Version 200410.0.19041.982
    WindowsMicrosoftWindows 10 Version 20H210.0.19042.982
    WindowsMicrosoftWindows 76.1.7601.24597
    WindowsMicrosoftWindows 7 Service Pack 16.1.7601.24597
    WindowsMicrosoftWindows 8.16.3.9600.20017
    WindowsMicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.24597
    WindowsMicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.24597
    WindowsMicrosoftWindows Server 2008 Service Pack 26.0.6003.21117
    WindowsMicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.21117
    WindowsMicrosoftWindows Server 20126.2.9200.23347
    WindowsMicrosoftWindows Server 2012 (Server Core installation)6.2.9200.23347
    WindowsMicrosoftWindows Server 2012 R26.3.9600.20017
    WindowsMicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.20017
    WindowsMicrosoftWindows Server 201610.0.14393.4401
    WindowsMicrosoftWindows Server 2016 (Server Core installation)10.0.14393.4401
    WindowsMicrosoftWindows Server 201910.0.17763.1935
    WindowsMicrosoftWindows Server 2019 (Server Core installation)10.0.17763.1935
    WindowsMicrosoftWindows Server version 200410.0.19041.982
    WindowsMicrosoftWindows Server version 20H210.0.19042.982

    References & sources

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    <a href="https://intel.neosec.eu/en/cve/CVE-2021-28455"><img src="https://intel.neosec.eu/badge/cve/CVE-2021-28455.svg?lang=en" alt="CVE-2021-28455 – NEOSEC Intel" height="20"></a>