CVE-2013-3163: in the CISA KEV catalogue
Microsoft Internet Explorer Memory Corruption Vulnerability. CISA added CVE-2013-3163 to the Known Exploited Vulnerabilities catalogue on 2023-03-30 with a default due date of 2023-04-20. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code or cause a denial of service via a crafted website. (CISA description)
- Vendor / product
- Microsoft Internet Explorer
- CWE
- CWE-94
- CISA required action
- The impacted product is end-of-life and should be disconnected if still in use.
- EPSS
- 71%, percentile 99 (scored 2026-11-03)
EPSS puts about 71 in 100 odds (71%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2013-3163 in the CISA KEV catalogue?
Yes. CISA added CVE-2013-3163 (Microsoft Internet Explorer Memory Corruption Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2023-03-30. CISA's default due date for it is 2023-04-20.
Is CVE-2013-3163 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2013-3163. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2013-3163?
CISA's required action: The impacted product is end-of-life and should be disconnected if still in use.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2013-3163