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Weekly Signal
Live intelligence Updated 20 Aug 2026 · 01:51 UTC

Microsoft · Office, Office Compatibility Pack, Office Web Apps +3 more

CVE-2015-1641

Microsoft Office Memory Corruption Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Microsoft Security patch Ms15 033

View response plan
CVSS7.8
EPSS92.9%
KEVYes
ExploitationConfirmed exploitation
RemediationExplicit patch identified ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 92.9%; technical severity is CVSS 7.8.

Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Word for Mac 2011, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2 and 2013 SP1, and Office Web Apps Server 2010 SP2 and 2013 SP1 allow remote attackers to execute arbitrary code via a crafted RTF document, aka "Microsoft Office Memory Corruption Vulnerability."

Who should care

  • Teams operating Office, Office Compatibility Pack, Office Web Apps +3 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Office, Office Compatibility Pack, Office Web Apps +3 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Microsoft Security patch Ms15 033
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Patch

Required Action

Technical details

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-399
Affected versions
Microsoft Office (Version 2010); Microsoft Office Compatibility Pack (Version -); Microsoft Office Web Apps (Version 2010 | Version 2013); Microsoft Outlook (Version 2011); Microsoft Sharepoint Server (Version 2010 | Version 2013); Microsoft Word (Version 2007 | Version 2010 | Version 2011 | Version 2013)
Fixed versions
No explicit fixed version is currently recorded.
Published
14 April 2015
Attack vector
Local
Privileges required
None
User interaction
Required

Signal timeline

  1. CVE published
  2. Added to CISA KEV
  3. Latest EPSS score: 92.9%
  4. Signal calculated at 82

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.