CVE•Published 2021-09-15•Modified 2026-08-10•1 article on news•6 live references•NVD data
CVE-2021-38646Microsoft · 365_apps
Vulnerability data via NVD (ingested)
CVSS v3.1
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS percentile
90
Exploit Prediction Scoring System · top 10% of all CVEs
Description
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Timeline
Published 2021-09-15
Modified 2026-08-10
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-38646Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Microsoft 365 Apps"All exposed Microsoft 365 Apps instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"365 Apps"HTTP body or banner mentions "365 Apps" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-38646Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-38646Censys host search filtered to this CVE id.
grep.app
CVE-2021-38646Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-38646GitHub code search for direct mentions.
Google dork
"CVE-2021-38646" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (6)
CVE-2021-386466 repos
Threekiii/Awesome-POCJava
一个漏洞 PoC 知识库。A knowledge base for vulnerability PoCs(Proof of Concept), with 1k+ vulnerabilities.
Spacial/awesome-csirtC
Awesome CSIRT is an curated list of links and resources in security and CSIRT daily activities.
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
Awrrays/FrameVulunknown
POC集合，框架nday漏洞利用
peiqiF4ck/WebFrameworkTools-5.5-enhanceC#
本软件首先集成危害性较大框架和部分主流cms的rce(无需登录,或者登录绕过执行rce)和反序列化(利用链简单)。傻瓜式导入url即可实现批量getshell。批量自动化测试。例如:Thinkphp,Struts2,weblogic。出现的最新漏洞进行实时跟踪并且更新例如:log4jRCE,向日葵 禅道RCE 瑞友天翼应用虚拟化系统sql注入导致RCE大华智…
Threekiii/CVEunknown
一个 CVE 漏洞预警知识库，无 exp/poc，部分包含修复方案。A knowledge base of CVE security vulnerability, no PoCs/exploits.