SafariWeb browser · Apple
CVE-2016-1778
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 · uneditedWebKit in Apple iOS before 9.3 and Safari before 9.1 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.
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 confidenceA memory corruption vulnerability in WebKit allows remote attackers to execute arbitrary code or cause denial of service by tricking users into visiting crafted malicious web pages. The vulnerability affects Safari on OS X and iOS devices running versions prior to 9.3 for iOS and 9.1 for Safari.
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
SafariWeb browser
<= 9.0.3<= 9.2.1CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/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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Check Safari version on macOSOpen Safari, click Safari menu > About Safari. The version number is displayed next to 'Safari'. Compare this to the affected version 9.0.3.Affected if Safari version is 9.0.3 or earlier on macOS
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Check iOS version on iPhone/iPadOn the device, go to Settings > General > About. The version number is shown next to 'Version'. Compare to affected version 9.2.1.Affected if iOS version is 9.2.1 or earlier on the device
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Confirm WebKit-based browser usageIdentify any browsers based on WebKit engine (Safari is the primary one on Apple devices). Check installed applications or device management profiles for Safari presence.Affected if Safari or another WebKit-based browser is installed and permitted for use
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Verify browser is accessible to usersCheck if Safari is enabled in Settings > Restrictions (iOS) or verify the browser executable exists at /Applications/Safari.app (macOS).Affected if Safari is present and not restricted or disabled in the environment
A device is affected if it runs Safari 9.0.3 or earlier on macOS, or iOS 9.2.1 or earlier, and Safari is accessible to users who could be tricked into visiting malicious web pages.
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 dataApply vendor-supplied patches by updating iOS to version 9.3 or later and Safari to version 9.1 or later. Organizations should ensure endpoint management tools can verify and enforce these updates across all managed devices.
Fix this in Safari
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-1778 — 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-2016-1778 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