CVE-2015-2521

NONECVSS 0.0Weaponized

0.0

Microsoft Excel 2007 SP3, Excel 2010 SP2, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

CVSS v3: —
EG Score: 0.0(none)
EPSS: 98.7%
KEV: Not listed

Published

September 9, 2015

Last Modified

May 6, 2026

References (6)

secure@microsofthttp://www.securitytracker.com/id/1033488
secure@microsofthttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-099
secure@microsofthttps://www.exploit-db.com/exploits/38216/
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1033488
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-099
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/38216/

Data Freshness Timeline

(refreshed 5× in last 7d / 20× 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.

2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore
2026-05-26 13:41 UTCEPSS rescore
2026-05-22 23:44 UTCEG score recompute
2026-05-22 23:44 UTCGHSA enrichment
2026-05-22 21:15 UTCEPSS rescore
2026-05-22 21:15 UTCEPSS rescore
2026-05-21 22:40 UTCEPSS rescore
2026-05-20 22:37 UTCEPSS rescore
2026-05-20 22:37 UTCEPSS rescore
2026-05-18 21:30 UTCEPSS rescore

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-38216✓ verified
First seen Sep 16, 2015
Microsoft Office 2007 - OLESSDirectyEntry.CreateTime Type Confusion
Open source ↗

Frequently asked(4)

What is CVE-2015-2521?

CVE-2015-2521 is a none vulnerability published on September 9, 2015. Microsoft Excel 2007 SP3, Excel 2010 SP2, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

When was CVE-2015-2521 disclosed?

CVE-2015-2521 was first published in the National Vulnerability Database on September 9, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-2521 actively exploited?

CVE-2015-2521 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-2521?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-2521, 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.

Dependency Blast Radius

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CVE-2015-2521

📅 Published

🔄 Last Modified

🔗 References (6)