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CVE-2021-30952 is an integer overflow vulnerability in Apple WebContent processing that affects multiple Apple platforms, including tvOS, macOS, Safari, iOS, iPadOS, and watchOS. The flaw was addressed through improved input validation. Processing maliciously crafted web content can trigger the overflow and lead to memory corruption conditions that enable arbitrary code execution. Reporting also associates the vulnerability with WebContent read/write exploitation in exploit-chain activity targeting older iOS versions.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
33 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebContent RCE exploit in the Coruna exploit kit affecting older iOS versions up to the 15.2 patch boundary.
An iOS vulnerability explicitly described as exploited by Coruna exploit chains and added by CISA to the Known Exploited Vulnerabilities catalog.
A WebContent read/write exploit component used within the Coruna iOS exploit kit.
An iOS WebContent/WebKit-related vulnerability used as part of the Coruna (CryptoWaters) exploit kit, enabling read/write primitives in the browser content process.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.