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Vulnerabilities

Vulnerability · CVE-2011-0101

Microsoft Excel Improper Restriction of Operations within the Bounds of a Memory Buffer

Published Sep 29, 2016 · catalog updated Sep 29, 2016 · Microsoft Excel

Patch now

CVE-2011-0101 is in the CISA known-exploited catalog. Confirm Microsoft Excel against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
29.97%
Remediation
Remediation guidance
Affected products
vendor Microsoft Excel

Microsoft Excel 2002 SP3 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted RealTimeData record, related to a stTopic field, double-byte characters, and an incorrect pointer calculation, aka "Excel Record Parsing WriteAV Vulnerability."

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Microsoft Excelversion unspecified

How to fix CVE-2011-0101

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2011-0101 is in the CISA known-exploited catalog. Confirm Microsoft Excel against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 29.97%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 29, 2016 · VulnCheck KEV

    Detected

    Microsoft Excel 2002 SP3 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted RealTimeData record, related to a stTopic field, double-byte characters, and an incorrect pointer calculation, aka "Excel Record Parsing WriteAV Vulnerability."

  2. Sep 29, 2016 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2011-0101

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2011-0101

    30-day exploitation probability 30.0%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2011-0101

    Microsoft Excel 2002 SP3 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted RealTimeData record, related to a stTopic field, double-byte characters, and an incorrect pointer calculation, aka "Excel Record Parsing Write

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.