What is CVE-2010-2520?

CVE-2010-2520 is a vulnerability in Apple Mac OS X, classified under Out-of-bounds Write. Published 2010-08-19.

Is CVE-2010-2520 known to be exploited?

34 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Apple Mac OS X

CVE-2010-2520

Heap-based buffer overflow in the Ins_IUP function in truetype/ttinterp.c in FreeType before 2.4.0, when TrueType bytecode support is enabled, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.

Vulnerability class: Buffer Overflow

Published 2010-08-19 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 5.1 (Medium). Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.057 (92.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.057 · newest: 0.057 · change: 0.000

Affected products

Apple Mac OS X
Freetype
Canonical Ubuntu Linux — versions 6.06, 10.04, 9.04
Debian Linux — versions 5.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

www.ubuntu.com/usn/USN-963-1 (vendor-advisory, Third Party Advisory)
support.apple.com/kb/HT4435 (Broken Link)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
savannah.nongnu.org/bugs/ (Exploit, Third Party Advisory, Issue Tracking)
git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/ (Patch, Third Party Advisory)
lists.nongnu.org/archive/html/freetype/2010-07/msg00001.html (mailing-list, Mailing List, Third Party Advisory, Release Notes)
lists.apple.com/archives/security-announce/2010//Nov/msg00000.html (vendor-advisory, Mailing List, Third Party Advisory)
marc.info/ (mailing-list, Mailing List, Third Party Advisory)
www.debian.org/security/2010/dsa-2070 (vendor-advisory, Third Party Advisory)
marc.info/ (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2010-2520?: CVE-2010-2520 is a vulnerability in Apple Mac OS X, classified under Out-of-bounds Write. Published 2010-08-19.
Is CVE-2010-2520 known to be exploited?: 34 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.