Internet Explorer Control Vulnerability Enables RCE via User Clicks
Severity: High (Score: 66.0)
Sources: Cybersecuritynews, Gbhackers
Published: · Updated:
Keywords: internet, explorer, webbrowser, control, into, clicks, legacy
Severity indicators: rce
Summary
A vulnerability in Internet Explorer's legacy WebBrowser control allows attackers to exploit user clicks for remote code execution (RCE) on Windows systems. Despite the retirement of Internet Explorer, the Trident engine and WebBrowser ActiveX control are still embedded in various Windows applications. Attackers can leverage the zone model, Mark of the Web (MOTW) handling, and COM/ActiveX components to execute arbitrary code. This vulnerability affects systems that utilize applications relying on the legacy control, potentially impacting a wide range of users. The specific CVE associated with this vulnerability has not been disclosed, and no patches are currently available. Security researchers from PT Security have confirmed the exploitability of this issue. Organizations are advised to assess their systems for reliance on the affected components. The situation remains critical as exploitation could lead to severe breaches. Key Points: • Legacy WebBrowser control in Internet Explorer can be exploited for RCE. • Attackers can turn user clicks into remote code execution via COM/ActiveX components. • No patches are currently available, increasing the urgency for organizations to assess their systems.
Detailed Analysis
**Impact** Windows systems remain affected despite Internet Explorer’s official retirement, as the embedded WebBrowser control and Trident engine persist in many applications. This vulnerability enables attackers to achieve remote code execution (RCE) through a single user click, potentially compromising enterprise environments across multiple sectors relying on legacy Windows software. No specific numbers, sectors, or geographic details were provided. **Technical Details** Attackers exploit the legacy WebBrowser ActiveX control by leveraging Internet Explorer’s zone model and Mark of the Web (MOTW) handling to escalate a user click into full RCE. The attack chain involves abusing COM/ActiveX components embedded in Windows applications that use the Trident engine. No CVE identifiers, malware names, or infrastructure details were disclosed in the sources. **Recommended Response** Defenders should prioritize disabling or restricting the use of the WebBrowser ActiveX control in applications where possible and monitor for suspicious COM/ActiveX activity indicative of exploitation attempts. Applying any available Windows updates addressing legacy components is advised, though no specific patches were mentioned. Organizations should also implement user awareness to minimize risky clicks and monitor endpoint logs for anomalous behavior related to legacy IE components.
Source articles (2)
- Internet Explorer WebBrowser Control Attack Chain Turns Clicks Into RCE — Cybersecuritynews · 2026-06-08
Internet Explorer’s legacy WebBrowser control can still be abused to turn a single user click into full remote code execution (RCE) on Windows systems, even though the browser is officially retired. P… - Internet Explorer WebBrowser Control Abuse Lets Attackers Convert Clicks Into RCE — Gbhackers · 2026-06-08
Internet Explorer’s legacy WebBrowser control can be abused to turn seemingly harmless user clicks into full remote code execution (RCE), even on systems that no longer use Internet Explorer as a stan…
Timeline
- 2026-06-08 — Vulnerability disclosed: PT Security reported that the Internet Explorer WebBrowser control can be exploited for RCE through user clicks.
- 2026-06-08 — Exploit method detailed: The attack method involves exploiting the zone model and Mark of the Web handling in legacy applications.
Related entities
- Malware (Attack Type)
- Zero-day Exploit (Attack Type)
- T1203 - Exploitation for Client Execution (Mitre Attack)
- Internet Explorer (Platform)
- Windows (Platform)