CVE-2016-1775
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedTrueTypeScaler in Apple iOS before 9.3, OS X before 10.11.4, tvOS before 9.2, and watchOS before 2.2 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted font file.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceTrueTypeScaler in Apple iOS, OS X, tvOS, and watchOS contains a memory corruption vulnerability when parsing crafted font files. Remote attackers can exploit this to execute arbitrary code or cause a denial of service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 9.3< 10.11.4< 9.2< 2.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify your Apple device typeDetermine whether the device is an iPhone, iPad (iOS), Mac computer (OS X/macOS), Apple TV (tvOS), or Apple Watch (watchOS). This determines which version threshold applies.Affected if Device runs any of the affected Apple OS types (iOS, OS X, tvOS, watchOS)
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Check iOS version on iPhone or iPadOpen Settings > General > About and look at the 'Version' field, or run 'sw_vers' on a jailbroken device. Record the full version number (e.g., 9.2.1).Affected if Version is lower than 9.3 (for example, 9.2.1 or 9.2)
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Check macOS/OS X version on MacClick Apple menu > About This Mac to see the version, or run 'sw_vers' in Terminal. Record the version number (e.g., 10.11.3).Affected if Version is lower than 10.11.4 (for example, 10.11.3, 10.11.2, etc.)
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Check tvOS version on Apple TVGo to Settings > General > About > Version on the Apple TV device. Record the version number.Affected if Version is lower than 9.2 (for example, 9.1 or 9.0)
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Check watchOS version on Apple WatchOpen the Watch app on the paired iPhone, go to General > About, and note the watchOS version. Alternatively, check on the Watch under Settings > About.Affected if Version is lower than 2.2 (for example, 2.1 or 2.0)
You are affected if your device runs iOS below 9.3, OS X/macOS below 10.11.4, tvOS below 9.2, or watchOS below 2.2, and you process untrusted font files with built-in applications.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data2.29.29.3
Apply vendor-supplied updates: upgrade iOS to 9.3 or later, OS X to 10.11.4 or later, tvOS to 9.2 or later, and watchOS to 2.2 or later.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1775 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2016-1775 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data