Security readout for executives and security teams
Plain-English summary
This vulnerability lets a malicious website learn whether specific files exist on a user's Windows system. That can expose sensitive clues about software, documents, or configuration. The CVSS score is medium, but CISA KEV status raises urgency because exploitation is known.
Executive priority
Prioritize remediation because CISA lists this as known exploited. The direct impact is information disclosure, but file-existence leaks can support targeted attacks and profiling of sensitive systems.
Technical view
CVE-2016-3298 affects Microsoft Internet Explorer 9 through 11 and the Internet Messaging API on listed Windows versions. A remote unauthenticated attacker can use a crafted website with user interaction to disclose arbitrary file-existence information. The CVSS vector shows high confidentiality impact and no integrity or availability impact.
Likely exposure
Exposure is most likely in legacy environments using Internet Explorer 9-11 or the affected Windows Vista SP2, Server 2008 SP2/R2 SP1, and Windows 7 SP1 components named in the CVE description.
Exploitation context
CISA KEV status supports known exploitation. The provided sources do not describe campaigns, exploit prevalence, or technical exploit mechanics. Treat affected systems as priority remediation targets, especially where users can browse untrusted sites.
Researcher notes
The bundle identifies affected products broadly but does not provide granular CPEs, exploit details, or separate root-cause analysis. Validation should focus on Microsoft bulletin applicability, patch state, and legacy browser or OS exposure.
Mitigation direction
- Apply the Microsoft security updates referenced in MS16-118 and MS16-126.
- Check current Microsoft guidance for affected systems and supported update paths.
- Inventory remaining Internet Explorer 9-11 usage in the environment.
- Reduce access to untrusted browsing from affected legacy Windows systems.
- Prioritize remediation for systems used by privileged or high-risk users.
Validation and detection
- Confirm whether affected Windows and Internet Explorer versions remain in use.
- Verify MS16-118 and MS16-126 updates are installed where applicable.
- Review vulnerability management results for CVE-2016-3298 coverage.
- Check endpoint telemetry for legacy Internet Explorer execution.
- Document any unsupported systems needing migration or compensating controls.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2016-3298 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- MS16-118CVE reference · vendor-advisory, x_refsource_MS
- MS16-126CVE reference · vendor-advisory, x_refsource_MS
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-3298CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.