Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 82.5%; technical severity is CVSS 8.8.
The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability," a different vulnerability than CVE-2016-7201, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.
Who should care
- Teams operating Edge
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Edge is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Microsoft Security patch Ms16 129
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CWE
- CWE-119
- Affected versions
- Microsoft Edge (Version -)
- Fixed versions
- No explicit fixed version is currently recorded.
- Published
- 10 November 2016
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 82.5%
- Signal calculated at 82
External references
- CISA Government advisory CVE-2016-7200
- Exploit information from github.com
- Packetstormsecurity Third-party advisory Microsoft Edge Chakra.dll Information Leak Type Confusion
- Securityfocus Third-party advisory
- Securitytracker Third-party advisory 1037245
- Exploit information from www.exploit-db.com
- Exploit information from www.exploit-db.com