CVE-2015-2425: Internet Explorer 11 memory corruption remote code execution

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: high.

high priorityIt is a remotely reachable memory corruption flaw with confirmed exploitation in CISA KEV and high EPSS, though it requires user interaction and affects a legacy browser.

What it is

Microsoft Internet Explorer 11 contains an out-of-bounds write (CWE-787) that corrupts memory when a crafted web page is processed, allowing remote code execution or denial of service. It is a distinct flaw from CVE-2015-2383 and CVE-2015-2384 and was addressed in Microsoft bulletin MS15-065. Because it is listed in CISA KEV, it has been exploited in the wild and remains a real risk wherever IE11 is still present.

Impact

An attacker who successfully triggers the flaw can execute arbitrary code in the context of the IE11 process, or crash it to cause a denial of service. Code execution at that level gives the attacker the user's privileges on the host.

Attack surface

Reached over the network by luring a user to a crafted web site; the CVSS vector shows AV:N/AC:L/PR:N/UI:R, so no authentication is required but user interaction (visiting the page) is needed. The description does not specify any additional preconditions.

Exploitation

CVE-2015-2425 is in the CISA KEV catalog (added 2022-05-25), confirming known exploitation, and EPSS gives a 30-day probability of 0.44851 (98.7th percentile). No ransomware campaign use is documented in the record.

What to do

• Apply the MS15-065 updates per vendor instructions; this is the primary fix.
• Retire or disable Internet Explorer 11 where it is no longer required.
• Enforce a modern supported browser as the default and block IE11 execution via policy.
• Restrict or filter outbound web access and use network controls to reduce exposure to malicious sites.
• Keep IE11 patched and hardened where it cannot be removed, and limit user privileges to reduce post-exploitation impact.

Detection

• Hunt for IE11 (iexplore.exe) crashes or abnormal terminations that correlate with web browsing activity.
• Monitor for iexplore.exe spawning child processes such as cmd.exe, powershell.exe or script hosts, which is atypical for normal browsing.
• Review proxy and DNS logs for IE11 user agents reaching newly registered or low-reputation domains.
• Check endpoint telemetry for memory corruption indicators or exploit-mitigation events (for example DEP/ASLR violations) tied to iexplore.exe.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.