CVE-2021-27085
Internet Explorer Remote Code Execution Vulnerability
Internet Explorer Remote Code Execution Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Internet Explorer Remote Code Execution Vulnerability
Internet Explorer Remote Code Execution Vulnerability
- Record
CVE-2021-27085- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-13856
Internet Explorer Remote Code Execution Vulnerability
- Record
EUVD-2021-13856- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-vm76-5x29-7jx8
Internet Explorer Remote Code Execution Vulnerability
Internet Explorer Remote Code Execution Vulnerability
- Record
GHSA-vm76-5x29-7jx8- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L - Updated
- 2026-11-02
CISA KEV No score
Microsoft Internet Explorer Remote Code Execution Vulnerability
Microsoft Internet Explorer contains an unspecified vulnerability that allows for remote code execution.
- Record
CVE-2021-27085- Updated
- 2026-11-02
NVD
Internet Explorer Remote Code Execution Vulnerability
- Record
CVE-2021-27085- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.6 High
AV:N/AC:H/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27085 is a high vulnerability (CVSS 8.8) in Microsoft Internet Explorer, published March 11, 2021. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.45%, the 92nd percentile. No source names a fixed version.