CVE-2012-1856
Actively exploited. CVE-2012-1856 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
The TabStrip ActiveX control in the Common Controls in MSCOMCTL.OCX in Microsoft Office allows remote attackers to execute arbitrary code via a crafted (1) document or (2) web page that triggers system-state corruption.
CSIRTS triage
- What
- The TabStrip ActiveX control in MSCOMCTL.OCX allows remote attackers to execute arbitrary code via a crafted document or web page.
- Who is affected
- Users of Microsoft Office are affected.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Update Microsoft Office to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2012-1856: Microsoft Office MSCOMCTL.OCX Remote Code Execution Vulnerabilitycisa-kev · 2022-03-03
External references
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