Microsoft Internet Explorer Messaging API Information Disclosure Vulnerability
An information disclosure vulnerability exists when the Microsoft Internet Messaging API improperly handles objects in memory. An attacker who successfully exploited this vulnerability could allow the attacker to test for the presence of files on disk.
- Vendor
- Microsoft
- Product
- Internet Explorer
- CVSS
- 6.5
- EPSS (exploit probability)
- 33.3%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2016-3298 being exploited?
Yes. CISA added CVE-2016-3298 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 33.3% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2016-3298 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Microsoft Internet Explorer CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2010-0806 Microsoft Internet Explorer Use-After-Free Vulnerability | [ HIGH ] | 8.8 | 82.1% | |
| CVE-2010-0249 Microsoft Internet Explorer Use-After-Free Vulnerability | [ HIGH ] | 8.8 | 91.9% | |
| CVE-2010-3962 Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability | [ HIGH ] | 8.1 | 96.8% | |
| CVE-2013-3893 Microsoft Internet Explorer Resource Management Errors Vulnerability | [ HIGH ] | 8.8 | 87.6% | |
| CVE-2012-4792 Microsoft Internet Explorer Use-After-Free Vulnerability | [ HIGH ] | 8.8 | 78.8% | |
| CVE-2013-3163 Microsoft Internet Explorer Memory Corruption Vulnerability | [ HIGH ] | 8.8 | 70.7% | |
| CVE-2012-4969 Microsoft Internet Explorer Use-After-Free Vulnerability | [ HIGH ] | 8.1 | 80.3% | |
| CVE-2015-2425 Microsoft Internet Explorer Memory Corruption Vulnerability | [ HIGH ] | 8.8 | 44.7% |