CVE-2014-1776 is a memory corruption vulnerability in Microsoft Internet Explorer. CISA added it to the Known Exploited Vulnerabilities catalogue on 28 January 2022, which means attackers have used it in real attacks. Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code in the context of the current user.
What this vulnerability means in Internet Explorer
Memory corruption in a browser is dangerous because it can turn ordinary web content into code execution. In Internet Explorer, that means a malicious page, advertisement, or compromised site can potentially force the browser to run attacker-controlled code in the context of the current user.
That matters even when the initial foothold is “just” a browser session. Browser exploitation often becomes the first step in a broader intrusion chain, especially when the user has access to sensitive documents, internal portals, or privileged enterprise systems.
Why it is dangerous when the browser is the target
A browser sits at the boundary between untrusted internet content and trusted local access. When that boundary fails, the attacker is no longer limited to scripting inside the page, because memory corruption can break out of the browser’s normal security model and enable native code execution.
For older browsers such as Internet Explorer, the practical danger is amplified by legacy exposure: outdated endpoints, compatibility settings, and embedded use in enterprise applications can leave the vulnerable browser reachable long after it should have been retired.
How organisations assess exposure
Exposure starts with knowing whether Internet Explorer still exists anywhere in the environment, including fallback launch paths, kiosks, virtual desktops, and application compatibility modes. Organisations should also check whether the affected browser is internet-exposed in practice, because a browser that is present but not used for web access is a very different risk from one that regularly visits external sites.
Vendor advisories and the CISA Known Exploited Vulnerabilities catalogue are the authoritative sources for version and remediation detail. For broad vulnerability triage and prioritisation, NIST National Vulnerability Database and the CVE Program are the right reference points, while NHI Management Group’s vulnerability management guide explains how to use asset scope and KEV-style prioritisation in practice.
Remediation, detection, and post-compromise review
Where a patch cannot be applied immediately, the practical goal is to reduce browser reachability and limit what a successful exploit can do. That usually means removing unnecessary access to the vulnerable browser, constraining the endpoints that can launch it, and tightening controls around web browsing, downloads, and script execution.
Detection should look for signs that the browser was used as an initial execution vector, followed by unusual child processes, unexpected network connections, or new persistence on the host. If exploitation is suspected, organisations should treat the browser session as potentially compromised and review the endpoint for secondary payloads, new accounts, scheduled tasks, or stolen browser data.
Because browser exploitation often occurs in the context of a signed-in user, identity material may also need review after compromise. Session cookies, stored credentials, and tokens should be considered exposed if the user visited sensitive systems during the attack window.
Risk and Threat Considerations
Memory corruption vulnerabilities in browsers are high-value targets because they can convert a single visit to a malicious or compromised page into remote code execution. In practice, that makes the browser a reliable delivery point for malware, credential theft, follow-on payloads, and lateral movement.
Failure mechanism: The exploit corrupts memory in the browser process, allowing attacker-controlled code to run with the privileges of the current user, then uses that foothold to stage additional malicious activity.
Impact: The result can include endpoint compromise, theft of browser-stored secrets or active sessions, and expansion into internal systems that the user can already reach.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST CSF 2.0, NIST SP 800-53 Rev 5 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | DE.CM-01 — Networks and external systems are monitored | Browser exploitation is detected through monitoring of endpoint and network activity. |
| Recommendation — Monitor endpoint and network activity for browser exploit indicators and follow-on connections. | ||
| NIST SP 800-53 Rev 5 | SI-4 — System Monitoring | Exploit activity requires detection of suspicious process and host behaviour. |
| CM-7 — Least Functionality | Legacy browser exposure is reduced by removing unnecessary browser capability and reachability. | |
| Recommendation — Use SI-4 to detect abnormal child processes, persistence, and exploit-driven behaviour. Use CM-7 to remove or constrain Internet Explorer where it is no longer required. | ||
| CIS Controls v8 | CIS-8 — Audit Log Management | Post-exploit review depends on trustworthy logs from browsers and endpoints. |
| CIS-7 — Continuous Vulnerability Management | KEV-listed browser flaws require exposure-based prioritisation and remediation tracking. | |
| Recommendation — Centralize and review endpoint and browser logs for signs of exploitation and follow-on activity. Track KEV-listed browser flaws and prioritize remediation on exposed endpoints first. | ||
Practitioner Guidance
Why practitioners should care: Treat internet explorer memory corruption as an exploitable attack path, not just a software defect. A browser exploit can bypass user awareness entirely, so remediation should be driven by exposure and business reach, not by whether the browser is still “officially” in use.
What to watch for: Focus on endpoints that still retain legacy browser support, repeated visits to untrusted content, and any post-exploit behaviour that suggests payload delivery or credential access. If the browser is present for compatibility reasons, it should be isolated as tightly as possible from normal user browsing.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on October 17, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org