CVE-2016-7202
HIGHCVE-2016-7202 is a high-severity (CVSS 7.5) Buffer Overflow vulnerability in microsoft edge. 4 public exploit references exist, so weaponization risk is real. O3 Security detects and blocks CVE-2016-7202 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
The scripting engines in Microsoft Internet Explorer 9 through 11 and Microsoft Edge allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption)…
Description
The scripting engines in Microsoft Internet Explorer 9 through 11 and Microsoft Edge allow 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," as demonstrated by the Chakra JavaScript engine, a different vulnerability than CVE-2016-7200, CVE-2016-7201, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.
Affected Products
edgemicrosoftResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Microsoft Edge - 'Array.reverse' Overflow
by Google Security Research · Nov 18, 2016
Microsoft Edge Scripting Engine - Memory Corruption (MS16-129)
by Security-Assessment.com · Nov 21, 2016
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every microsoft edge deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Remediation status
No patch has shipped for CVE-2016-7202 yet — track the microsoft edge advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2016-7202 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2016-7202. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2016-7202 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2016-7202 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.