Apple iOS CVE-2026-64788

Exploitation requires a user on a vulnerable Apple device - iOS or iPadOS prior to 26.6.1, or macOS Tahoe prior to 26.6.2 - to actively process maliciously crafted web content, meaning the victim must navigate to or load attacker-supplied content in a WebKit-based browser or in-app web view (UI:R is required; passive drive-by without any user action is not sufficient). No attacker-side authentication or elevated privileges are required (PR:N), and no special non-default device configuration needs to be present. Default device configurations with web browsing enabled are sufficient to be at risk. The limiting factors are: the mandatory user interaction step (the victim must open or visit the attacker's content), an impact ceiling of partial confidentiality and integrity only (no full code execution or availability impact confirmed), and unchanged scope (exploitation stays within the WebKit process boundary and cannot directly escalate to the OS).

The CVSS 5.4 medium score is internally consistent: while the attack vector is network-reachable (AV:N) with no privilege requirement (PR:N) and low complexity (AC:L), the mandatory user interaction (UI:R) and limited impact ceiling (C:L/I:L, A:N, S:U) constrain real-world exploitability considerably. EPSS places this at just 0.13% exploitation probability in the 3rd percentile, reflecting the research community's assessment that weaponization is unlikely in the near term - even a mid-sized municipal IT team in swidnica should treat this as an ordinary patch-cycle update rather than a drop-everything emergency. The absence of a KEV listing and the lack of any referenced POC or exploit code further reduce urgency. The scope-unchanged metric (S:U) confirms exploitation is bounded within the WebKit rendering process and cannot directly pivot to the OS kernel or adjacent processes. The CVSS impact metrics suggest partial memory read or write is the realistic ceiling, not arbitrary code execution. No conflicting signals exist between the CVSS vector and the written description. Overall, this is a real but measured risk: prioritize patching for MDM-managed enterprise fleets, executive devices, and public-facing kiosk deployments, but it does not warrant emergency change-control override.

An attacker hosts a maliciously crafted webpage engineered to trigger a buffer bounds violation in Apple's WebKit web content processing engine. A target user on an unpatched iOS, iPadOS, or macOS device visits the page via a phishing link, malicious advertisement, or compromised legitimate site, causing memory corruption within the rendering process that could allow the attacker to read or tamper with limited in-process memory. No public POC has been identified at the time of analysis, which increases the barrier for reliable exploitation.