Use After Free in Microsoft Internet_explorer
CVE-2013-3893
Use-after-free vulnerability in the SetMouseCapture implementation in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code via crafted JavaScript strings, as demonstrated by use of an ms-…
Vulnerability class: Use-After-Free
EPSS: 0.859 (99.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Internet_explorer — versions 6, 7, 8
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- secure@microsoft.com (x_refsource_JVNDB, Third Party Advisory, third-party-advisory)
- secure@microsoft.com (Third Party Advisory, x_refsource_JVN, third-party-advisory)
- secure@microsoft.com (x_refsource_CONFIRM, Vendor Advisory)
- secure@microsoft.com (vdb-entry, Broken Link, x_refsource_BID)
- secure@microsoft.com (Broken Link, signature, x_refsource_OVAL, vdb-entry)
- secure@microsoft.com (US Government Resource, x_refsource_CERT, third-party-advisory)
- secure@microsoft.com (x_refsource_CONFIRM, Vendor Advisory)
- secure@microsoft.com (x_refsource_MS, vendor-advisory, Vendor Advisory)
- secure@microsoft.com (Exploit, x_refsource_MISC)
- secure@microsoft.com (x_refsource_CONFIRM, Exploit)
Frequently asked questions
- What is CVE-2013-3893?
- CVE-2013-3893 is a high-severity vulnerability in Microsoft Internet_explorer, classified under Use After Free. CVSS score: 8.8/10. Published 2013-09-18.
- How severe is CVE-2013-3893?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2013-3893 known to be exploited?
- Yes. CVE-2013-3893 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-08-12), indicating it is being actively exploited. 31 public proof-of-concept repositories are indexed.