PatchSiren

PatchSiren cyber security CVE debrief

CVE-2016-0189 Microsoft CVE debrief

CVE-2016-0189 is a Microsoft Internet Explorer memory corruption vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. In the supplied official record, CISA marked it as known exploited and set a remediation due date of 2022-04-18, so this should be treated as a high-priority patching item for any environment that still has Internet Explorer exposure.

Vendor
Microsoft
Product
Internet Explorer
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-28
Original CVE updated
2022-03-28
Advisory published
2022-03-28
Advisory updated
2022-03-28

Who should care

Windows and endpoint administrators, vulnerability management teams, and organizations that still support Internet Explorer or legacy applications dependent on it should pay immediate attention. Any fleet owner responsible for patch compliance should treat this as a priority because it is listed by CISA as known exploited.

Technical summary

The official source corpus identifies the issue as a Microsoft Internet Explorer memory corruption vulnerability. Beyond that classification, the supplied records do not include exploit mechanics, affected versions, or a deeper technical root cause. The strongest available signal is CISA’s KEV listing, which indicates confirmed exploitation in the wild.

Defensive priority

Highest priority. CISA has placed this CVE in the Known Exploited Vulnerabilities catalog, which means exposed systems should be remediated urgently and tracked to completion.

Recommended defensive actions

  • Apply Microsoft updates per vendor instructions.
  • Inventory systems that still have Internet Explorer installed or enabled.
  • Prioritize remediation for any exposed or high-value endpoints that can still reach IE functionality.
  • Confirm patch status and document completion against the CISA due date.
  • Continue monitoring official Microsoft, CISA, and NVD records for any additional guidance.

Evidence notes

This debrief is based only on the supplied official records: the CISA KEV entry, the CVE record, and the NVD detail page. CISA’s KEV metadata names the vulnerability as a Microsoft Internet Explorer memory corruption issue, marks it as known exploited, and lists the remediation due date as 2022-04-18. No exploit code, proof-of-concept details, or unsupported technical claims were used.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-0189 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-0189

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-0189 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-0189

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.