CVE-2021-21191
HIGHCVSS 8.8/10EPSS 1.37%
Last modified
CVE-2021-21191 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Use after free in WebRTC in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.. EPSS estimates a 1.37% chance of exploitation in the next 30 days.
Description
Use after free in WebRTC in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Chrome | < 89.0.4389.90 | |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 10.0 |
References
- https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop_12.htmlRelease Notes, Third Party Advisory
- https://crbug.com/1167357Exploit, Issue Tracking, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202104-08Third Party Advisory
- https://www.debian.org/security/2021/dsa-4886Third Party Advisory
- https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop_12.htmlRelease Notes, Third Party Advisory
- https://crbug.com/1167357Exploit, Issue Tracking, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202104-08Third Party Advisory
- https://www.debian.org/security/2021/dsa-4886Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21191?
Use after free in WebRTC in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
How severe is CVE-2021-21191?
CVE-2021-21191 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.37% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21191?
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.
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Are you affected by CVE-2021-21191?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST