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CVE

CVE-2023-21716

Microsoft Word Remote Code Execution Vulnerability

Microsoft Word Remote Code Execution Vulnerability.

CRITICAL · CVSS 9.8 EPSS 0.91419
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  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
◆

Threat Actors Linked

2
actorIcedID / BokBot Operators (Lunar Spider)
actorQakbot / Qbot Operators
⬡

Weakness Classification

CWE-190Integer Overflow or Wraparound
▤

Affected Products & Versions

8
microsoft officeall versions
microsoft office long term servicing channelall versions
microsoft office online serverall versions
microsoft office web appsall versions
microsoft sharepoint enterprise serverall versions
microsoft sharepoint foundationall versions
microsoft sharepoint serverall versions
microsoft wordall versions
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighCode Executed Via Office Add-in XLL File
producthighPotential Persistence Via Microsoft Office Add-In
producthighPotential Persistence Via Microsoft Office Startup Folder
producthighFile With Uncommon Extension Created By An Office Application
producthighOffice Macro File Creation From Suspicious Process
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Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Feb 2023 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

8
msrcCVE-2023-21716Remote Code Execution
splunk-security-content7ac0fced-9eae-4381-a748-90dcd1aa9393
splunk-security-content55d8741c-fa32-4692-8109-410304961eb8
splunk-security-content73ce70c4-146d-11ec-9184-acde48001122
splunk-security-contentb8b19420-e892-11eb-9244-acde48001122
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