Risk | Critical |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-26411 |
CWE-ID | CWE-415 |
Exploitation vector | Network |
Public exploit | This vulnerability is being exploited in the wild. |
Vulnerable software |
Microsoft Internet Explorer Client/Desktop applications / Web browsers |
Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 09.03.2021
Added CVE-ID, bulletin status changed to patched.
EUVDB-ID: #VU50401
Risk: Critical
CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2021-26411
CWE-ID:
CWE-415 - Double Free
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing ".mht" files. A remote attacker can trick the victim to visit a specially crafted webpage, trigger a double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note, the vulnerability is being actively exploited in the wild.
Install update from vendor's website.
Vulnerable software versionsMicrosoft Internet Explorer: 9 - 11
CPE2.3http://enki.co.kr/blog/2021/02/04/ie_0day.html
http://twitter.com/dnpushme/status/1357264755333816320
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26411
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.