CVE-2017-8521 Memory corruption in Microsoft Edge

What is CVE-2017-8521?

CVE-2017-8521 is a high-severity memory corruption vulnerability in Microsoft Edge, published on 15 Jun 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Microsoft Edge in Windows 10 1703 allows an attacker to execute arbitrary code in the context of the current user when the Edge JavaScript scripting engine fails to handle objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8499, CVE-2017-8520, CVE-2017-8548, and CVE-2017-8549.

Weakness: CWE-119

Which versions are affected by CVE-2017-8521?

It affects 1 product.

Products include Microsoft Edge.

How do I fix CVE-2017-8521?

No fix has been published for CVE-2017-8521 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2017-8521 being exploited?

There is no known exploitation of CVE-2017-8521 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Edge

• CVE-2021-26411 Microsoft Internet Explorer Memory Corruption Exploited High 8.8
• CVE-2016-7200 Microsoft Edge Memory Corruption Exploited High 8.8
• CVE-2016-7201 Microsoft Edge Memory Corruption Exploited High 8.8
• CVE-2017-0037 Microsoft Edge and Internet Explorer Type Confusion Exploited High 8.1
• CVE-2016-3351 Microsoft Internet Explorer and Edge Information Disclosure Exploited Medium 6.5

All Microsoft Edge vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gj2r-fgc5-fq5r.