CVE-2021-27085
HIGHCVSS 8.8/10Actively ExploitedEPSS 3.71%
Last modified
CVE-2021-27085 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Internet Explorer Remote Code Execution Vulnerability. CISA has confirmed active exploitation in the wild. EPSS estimates a 3.71% chance of exploitation in the next 30 days.
Description
Internet Explorer Remote Code Execution Vulnerability
Metrics
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Internet Explorer | 11 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2021-27085?
Internet Explorer Remote Code Execution Vulnerability
How severe is CVE-2021-27085?
CVE-2021-27085 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.71% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2021-27085?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-27079Windows Media Photo Codec Information Disclosure Vulnerabili…5.7
- CVE-2021-27080Azure Sphere Unsigned Code Execution Vulnerability9.3
- CVE-2021-27081Visual Studio Code ESLint Extension Remote Code Execution Vu…7.8
- CVE-2021-27082Quantum Development Kit for Visual Studio Code Remote Code E…7.8
- CVE-2021-27083Remote Development Extension for Visual Studio Code Remote C…7.8
- CVE-2021-27084Visual Studio Code Java Extension Pack Remote Code Execution…7.8
- CVE-2021-27086Windows Services and Controller App Elevation of Privilege V…7.8
- CVE-2021-27088Windows Event Tracing Elevation of Privilege Vulnerability7.8
- CVE-2021-27089Microsoft Internet Messaging API Remote Code Execution Vulne…7.8
- CVE-2021-27090Windows Secure Kernel Mode Elevation of Privilege Vulnerabil…7.8
- CVE-2021-27091RPC Endpoint Mapper Service Elevation of Privilege Vulnerabi…7.8
- CVE-2021-27092Azure AD Web Sign-in Security Feature Bypass Vulnerability6.8
Are you affected by CVE-2021-27085?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST