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PatchSiren cyber security CVE debrief

CVE-2017-0059 Microsoft CVE debrief

CVE-2017-0059 is a Microsoft Internet Explorer information disclosure vulnerability that CISA has listed in its Known Exploited Vulnerabilities catalog. The official CISA entry directs organizations to apply updates per vendor instructions. Because it is in KEV, this issue should be treated as a high-priority patching item rather than a routine bulletin.

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

Organizations that still operate or support Microsoft Internet Explorer, plus security and IT teams responsible for patch management, endpoint hardening, and vulnerability remediation. This is especially important for environments that must track CISA KEV items for compliance or risk reduction.

Technical summary

The supplied official corpus identifies CVE-2017-0059 only at a high level as an information disclosure vulnerability in Microsoft Internet Explorer. CISA’s KEV catalog confirms the issue is known to be exploited in the wild. The corpus does not provide a CVSS score, detailed affected-version breakdown, or exploit mechanics, so the safest operational conclusion is to prioritize vendor updates and remove or restrict Internet Explorer use where possible.

Defensive priority

High. CISA KEV inclusion means the vulnerability is considered actively exploited and should be remediated promptly. In the supplied timeline, CISA added the entry on 2022-03-28 and set a remediation due date of 2022-04-18.

Recommended defensive actions

  • Apply Microsoft updates according to vendor instructions as directed by CISA KEV.
  • Inventory systems that still use or support Internet Explorer and prioritize them for remediation.
  • Where possible, disable or retire Internet Explorer in favor of supported browsers and configurations.
  • Verify patch deployment and confirm the vulnerability is no longer present on exposed endpoints.
  • Track this item in your KEV-driven remediation workflow until closure.

Evidence notes

The only authoritative evidence supplied here is the CISA Known Exploited Vulnerabilities JSON feed and the linked official references. CISA lists the vulnerability as 'Microsoft Internet Explorer Information Disclosure Vulnerability,' marks it as a KEV item, and instructs organizations to apply updates per vendor instructions. The corpus also points to the official CVE record and NVD detail page, but it does not include additional technical specifics or a CVSS score.

Official resources

This debrief is limited to the supplied official corpus and links. It intentionally avoids unsupported technical detail, exploit instructions, or assumptions about affected versions beyond what CISA and the official references provide.