CVE-2021-38646
Microsoft Office: Access Connectivity Engine Remote Code Execution
As of , CVE-2021-38646 in Microsoft Office is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 28 March 2022
- US federal deadline
- 18 April 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Known
- EPSS score
- 0.08Higher than 94% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.13 on 28 March 2022EPSS on the day CISA listed it.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.
CISA's description
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
The CVE record's description, from microsoft
- CVE published
- 15 September 2021
- Assigned by
- microsoft
- CVSS
- 7.8 High (CVSS 3.1, from the CNA)
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Office: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2010-3333Stack-based Buffer Overflow | Microsoft Office | Patch this weekMetasploit module; EPSS 0.89; verified Exploit-DB entry | 0.89 | ||
| CVE-2016-3235OLE DLL Side Loading | Microsoft Office | Patch this weekMetasploit module; verified Exploit-DB entry | 0.43 | ||
| CVE-2017-11882Memory Corruption | Microsoft Office | Patch this weekRansomware use; Metasploit module; EPSS 0.99 | 0.99 | ||
| CVE-2026-21509Security Feature Bypass | Microsoft Office | Patch this weekEPSS 0.71 | 0.71 | ||
| CVE-2009-0556PowerPoint Code Injection | Microsoft Office | Patch this weekEPSS 0.67 | 0.67 | ||
| CVE-2023-23397Outlook Privilege Escalation | Microsoft Office | Patch this weekEPSS 0.97 | 0.97 | ||
| CVE-2009-0563Buffer Overflow | Microsoft Office | Patch this weekEPSS 0.63 | 0.63 | ||
| CVE-2013-1331Buffer Overflow | Microsoft Office | Patch this weekEPSS 0.80 | 0.80 | ||
| CVE-2012-1856MSCOMCTL.OCX Remote Code Execution | Microsoft Office | Patch this weekEPSS 0.72 | 0.72 | ||
| CVE-2015-2545Malformed EPS File | Microsoft Office | Patch this weekEPSS 0.86 | 0.86 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org