CVEs / CVE-2021-26411
CVE-2021-26411: Microsoft Internet Explorer Memory Corruption Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- medium 5.1 CVSS 2.0 (NVD)
- EPSS 81.6% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.
Description
Internet Explorer Memory Corruption Vulnerability
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Internet Explorer 11 | from 1.0.0, before 10.0.17134.2087 | 10.0.17134.2087 |
| Microsoft Internet Explorer 9 | from 1.0.0, before 6.0.6003.21070 | 6.0.6003.21070 |
| Microsoft Microsoft Edge (EdgeHTML-based) | from 1.0..0, before 10.0.17134.2087 | 10.0.17134.2087 |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 17 Nov 2021 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 2.0 | 5.1 mediumAV:N/AC:H/Au:N/C:P/I:P/A:PScored by NVD |
|---|---|
| Weakness | CWE-416 |
References
- CVE-2021-26411 on NVD
- CVE-2021-26411 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26411 Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26411 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26411 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.