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PatchSiren cyber security CVE debrief

CVE-2012-0158 Microsoft CVE debrief

CVE-2012-0158 is a Microsoft MSCOMCTL.OCX remote code execution vulnerability that CISA lists in the Known Exploited Vulnerabilities catalog. That KEV listing means the issue is confirmed to have been exploited in the wild and should be treated as a high-priority remediation item using vendor guidance.

Vendor
Microsoft
Product
MSCOMCTL.OCX
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations that still rely on Microsoft MSCOMCTL.OCX, especially teams responsible for legacy applications, desktop estates, and any systems where the component is present.

Technical summary

The supplied sources identify CVE-2012-0158 as a Microsoft MSCOMCTL.OCX remote code execution vulnerability. CISA’s KEV catalog entry confirms it as a known exploited vulnerability and directs remediation through vendor instructions.

Defensive priority

Immediate. Because the vulnerability is in CISA’s Known Exploited Vulnerabilities catalog, remediation should be prioritized ahead of routine maintenance windows.

Recommended defensive actions

  • Apply updates per vendor instructions as referenced by CISA and the official vulnerability records.
  • Inventory systems and applications that depend on MSCOMCTL.OCX so affected assets are identified quickly.
  • Validate that remediation has been completed across all relevant endpoints and software deployments.
  • Track the issue against the CISA KEV catalog to ensure it remains on the active remediation list.

Evidence notes

The corpus provides an official CISA KEV entry naming Microsoft MSCOMCTL.OCX as the affected product and marking the vulnerability as known exploited. The provided official links point to the CVE record, NVD detail page, and the CISA KEV catalog/feed; no exploit instructions, root-cause analysis, or CVSS score were supplied in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2012-0158 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2012-0158

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

  • CVE-2012-0158 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2012-0158

    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.