What is CVE-2015-2426?

CVE-2015-2426 is a high-severity vulnerability in Microsoft Windows 10, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2015-07-20.

How severe is CVE-2015-2426?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2015-2426 known to be exploited?

Yes. CVE-2015-2426 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28), indicating it is being actively exploited. 35 public proof-of-concept repositories are indexed.

Buffer overflow in Microsoft Windows 10

CVE-2015-2426

Buffer underflow in atmfd.dll in the Windows Adobe Type Manager Library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote attackers to execute arbitrary code via a crafted OpenType font, aka "OpenType Font Driver Vulnerability."

Vulnerability class: Buffer Overflow

Published 2015-07-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.866 (99.7th percentile), scored 2026-10-15.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.866 · newest: 0.866 · change: 0.000

Affected products

Microsoft Windows 10
Microsoft Windows 7
Microsoft Windows 8
Microsoft Windows 8.1
Microsoft Windows Rt
Microsoft Windows Rt 8.1
Microsoft Windows Server 2008 — versions r2
Microsoft Windows Server 2012 — versions r2
Microsoft Windows Vista

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-28. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-04-18.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.securitytracker.com/id/1032991 (VDB Entry, Third Party Advisory, vdb-entry)
www.kb.cert.org/vuls/id/103336 (US Government Resource, Third Party Advisory, third-party-advisory)
blog.trendmicro.com/trendlabs-security-intelligence/a-look-at-the-open-type-fon… (Exploit, Third Party Advisory)
docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-078 (vendor-advisory, Patch, Vendor Advisory)
www.exploit-db.com/exploits/38222/ (VDB Entry, Third Party Advisory, exploit)
www.securityfocus.com/bid/75951 (VDB Entry, Third Party Advisory, vdb-entry)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2015-2426?: CVE-2015-2426 is a high-severity vulnerability in Microsoft Windows 10, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2015-07-20.
How severe is CVE-2015-2426?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2015-2426 known to be exploited?: Yes. CVE-2015-2426 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28), indicating it is being actively exploited. 35 public proof-of-concept repositories are indexed.