CVE-2015-2521

Exp

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."

Published: 2015-09-09 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-2521 is rated High Exploit Risk (89.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 69.18%, 99th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.48% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2015-2521

EDB-ID Source Kind Published Link
38216 exploit_db edb 2015-09-16 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2015-2521

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-29 66.70% 69.18% +2.48%
2 2026-01-31 66.83% 66.70% -0.13%
3 2025-06-15 — 66.83% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-2521

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2015-2521

Affected software / configurations for CVE-2015-2521

Vendor Product Version Raw CPE
microsoft excel 2007 cpe:2.3:a:microsoft:excel:2007:sp3:*:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:x86:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:x86:*:*
microsoft excel_viewer — cpe:2.3:a:microsoft:excel_viewer:*:*:*:*:*:*:*:*
microsoft office_compatibility_pack — cpe:2.3:a:microsoft:office_compatibility_pack:*:sp3:*:*:*:*:*:*

References for CVE-2015-2521

cvelogic Threat Intelligence