CVE-2021-26411
Internet Explorer Memory Corruption Vulnerability
Internet Explorer Memory Corruption 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 Memory Corruption Vulnerability
Internet Explorer Memory Corruption Vulnerability
- Record
CVE-2021-26411- 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 - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2021-13217
Internet Explorer Memory Corruption Vulnerability
- Record
EUVD-2021-13217- 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-c5rh-mmr6-c7ch
Internet Explorer Memory Corruption Vulnerability
Internet Explorer Memory Corruption Vulnerability
- Record
GHSA-c5rh-mmr6-c7ch- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-119, CWE-416, CWE-787
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Internet Explorer Memory Corruption Vulnerability
Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.
- Record
CVE-2021-26411- Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Internet Explorer Memory Corruption Vulnerability
- Record
CVE-2021-26411- 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
- 5.1 Medium
AV:N/AC:H/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | CrackerCat/CVE-2021-26411 | 2021-11-22 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26411 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. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 81.7%, the 99th percentile. No source names a fixed version.