CVE-2011-0104

HIGHCVSS v2 · 9.39.3—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 9.3 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 53.4% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
9.3EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 53%
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 53%CVSS v2: 9.3Exploit: Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Microsoft Excel 2002 SP3 and 2003 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted HLink record in an Excel file, aka "Excel Buffer Overwrite Vulnerability."

CVSS v2.0 (legacy)
9.3HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
9.3(low)
EG Risk
72(Track)
EG Risk 72/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity93% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
53%
EPSS %ILE
99%
KEV
Not listed

Published

April 13, 2011

Last Modified

April 29, 2026

References (18)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 1× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-25 13:43 UTCEPSS rescore
  2. 2026-08-19 16:58 UTCEPSS rescore
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  7. 2026-07-30 01:26 UTCEPSS rescore
  8. 2026-07-26 13:42 UTCEG score recompute▲ 9.30
  9. 2026-07-23 14:14 UTCEPSS rescore
  10. 2026-07-23 01:04 UTCEG score recompute
  11. 2026-07-23 00:39 UTCEG score recompute▼ 3.80
  12. 2026-07-23 00:07 UTCEG score recompute▲ 3.80
  13. 2026-07-22 21:46 UTCEG score recompute
  14. 2026-07-22 14:03 UTCEPSS rescore
  15. 2026-07-21 15:21 UTCEPSS rescore
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  1. 2026-07-11 08:22 UTCEPSS rescore
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  5. 2026-07-02 14:01 UTCEPSS rescore
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  8. 2026-06-30 23:19 UTCEPSS rescore
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  23. 2026-06-18 17:49 UTCEPSS rescore
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  29. 2026-06-15 17:44 UTCEPSS rescore
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  40. 2026-06-07 15:22 UTCEPSS rescore
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  42. 2026-06-06 13:45 UTCEPSS rescore
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  44. 2026-06-05 22:44 UTCEPSS rescore
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  49. 2026-06-01 13:49 UTCEPSS rescore
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  51. 2026-05-31 22:28 UTCEPSS rescore
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  53. 2026-05-31 00:14 UTCEPSS rescore
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  55. 2026-05-29 13:41 UTCEPSS rescore
  56. 2026-05-29 13:40 UTCEPSS rescore
  57. 2026-05-29 08:17 UTCEG score recompute
  58. 2026-05-29 08:17 UTCGHSA enrichment
  59. 2026-05-28 13:42 UTCEPSS rescore
  60. 2026-05-28 13:42 UTCEPSS rescore
  61. 2026-05-28 13:42 UTCEPSS rescore
  62. 2026-05-27 13:38 UTCEPSS rescore
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  64. 2026-05-26 07:16 UTCEPSS rescore
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  66. 2026-05-22 21:15 UTCEPSS rescore
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  69. 2026-05-20 22:37 UTCEPSS rescore
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  72. 2026-05-18 21:29 UTCEPSS rescore
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-35573✓ verified
    First seen Apr 12, 2011

    Microsoft Excel - Remote Buffer Overflow

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2011-0104?
CVE-2011-0104 is a high vulnerability published on April 13, 2011. Microsoft Excel 2002 SP3 and 2003 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted HLink record in an Excel file, aka "Excel Buffer Overwrite Vulnerability."
When was CVE-2011-0104 disclosed?
CVE-2011-0104 was first published in the National Vulnerability Database on April 13, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-0104 actively exploited?
CVE-2011-0104 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53% probability of exploitation in the next 30 days, which ranks it in the top 1.1% of all scored CVEs.
How do I remediate CVE-2011-0104?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-0104, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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