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CVE-2015-2523

49
FAUCET Score

CVE-2015-2523 is a critical memory corruption vulnerability affecting multiple versions of Microsoft Excel, Excel Viewer, and Office Compatibility Pack. This flaw allows remote attackers to execute arbitrary code on a victim's system simply by opening a specially crafted Office document. With a CVSS score of 9.3, it presents a high severity risk due to its network-based attack vector, medium attack complexity, and complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, public exploit code exists (EDB-38214), and it has garnered significant community discussion and media coverage, indicating its past relevance in threat landscapes, including being among the most popular MS Office exploits in Q1 2021.

Impacted Technologies

VendorProductVersion(s)CPE
2007CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2007:sp3:*:*:*:*:*:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:x64:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:x86:*
2011CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2011:*:*:*:*:mac:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
30.31%
Probability of exploitation in next 30 days
EPSS Percentile
98.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-38214 · Sep 16, 2015
This CVE's current EPSS score of 0.3031 is in the 93rd percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2015/ms15-099
exploit-db.com / exploits/38214
securitytracker.com / id/1033488