CVE-2011-0101Excel Memory Corruption
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…
Published Apr 13, 2011 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2011-0101 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Excel (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since Sep 29, 2016. No public exploit code is known.
- EPSS estimates a 30% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
30%
Higher than 98.2% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
52/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Sep 29, 2016
1996 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Advisories And Exploit References
- advisory39122
- advisoryADV-2011-0940
Description
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."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Sep 29, 2016 | n/a | Not reported |
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ExcelMicrosoft | 2002-sp3 | n/a |
Timeline
Publicly disclosed
Apr 13, 2011
Added to Industry KEV feed
Sep 29, 2016
Last updated
Apr 28, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisory39122
- advisoryADV-2011-0940
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- other71766
FAQ
Common Questions.
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."
Affected: Excel (Microsoft) versions 2002-sp3. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Sep 29, 2016.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2011-0101 On Your Attack Surface?
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