Integer underflow in Uniscribe in Microsoft Windows 7 SP1 and Windows Server 2008 R2 SP1 allows remote attackers to execute arbitrary code…

published 2015-12-09 10y ago modified 2026-06-17 4mo ago also EUVD-2015-6073

cvss: 9.3; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 20.7%; EPSS 20.7% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

Integer underflow in Uniscribe in Microsoft Windows 7 SP1 and Windows Server 2008 R2 SP1 allows remote attackers to execute arbitrary code via a crafted font, aka "Windows Integer Underflow Vulnerability."

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Exploit prediction

20.73% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

blogs.flexerasoftware.com http://blogs.flexerasoftware.com/secunia-research/2015/12/vulnerability-in-microsofts-unicode-scripts-processor-allows-execution-of-arbitrary-code.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-189 Numeric Errors

References

blogs.flexerasoftware.com /secunia-research/2015/12/vulnerability-in-microsofts-unicode-scripts-processor-allows-execution-of-arbitrary-
exploit, technical-description, third-party-advisory, vdb-entry
docs.microsoft.com /en-us/security-updates/securitybulletins/2015/ms15-130
vendor-advisory
securitytracker.com /id/1034337
vdb-entry

Sources

CVE List CVE-2015-6130
NVD CVE-2015-6130

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.