CVE-2016-1797
Apple Type Services (ATS) in Apple OS X before 10.11.5 allows attackers to bypass intended FontValidator sandbox-policy restrictions and execute arbitrary code in a privileged context via a crafted app.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.65%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Apple Type Services (ATS) in Apple OS X before 10.11.5 allows attackers to bypass intended FontValidator sandbox-policy restrictions and execute arbitrary code in a privileged context via a crafted app.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.65% probability · 76th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- apple/mac os x
- Source
- product-security@apple.com
EPSS moved from 3.0% on 21 September 2026 to 1.7% on 26 October 2026.
References
- http://lists.apple.com/archives/security-announce/2016/May/msg00004.htmlVendor Advisory
- http://www.securityfocus.com/bid/90696
- http://www.securitytracker.com/id/1035895
- http://www.zerodayinitiative.com/advisories/ZDI-16-360
- https://support.apple.com/HT206567Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00004.htmlVendor Advisory
- http://www.securityfocus.com/bid/90696
- http://www.securitytracker.com/id/1035895
- http://www.zerodayinitiative.com/advisories/ZDI-16-360
- https://support.apple.com/HT206567Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.