Is CVE-2016-4657 actively exploited?

Yes. CVE-2016-4657 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2016-4657 be exploited remotely?

The attack vector of CVE-2016-4657 has not been classified yet.

What is the CVSS score of CVE-2016-4657?

CVE-2016-4657 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2016-4657

HIGHCISA KEVIN THE WILD

CVE-2016-4657

Published: May 24, 2022

EPSS:78.36%probability of exploitation in 30 daysPercentile:99.0th

Official Description

Apple iOS WebKit contains a memory corruption vulnerability that allows attackers to execute remote code or cause a denial-of-service (DoS) via a crafted web site. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

NVD Source

CISA KEV Advisory

Apple iOS Webkit Memory Corruption Vulnerability

Added to KEV: 2022-05-24Federal patch deadline: 2022-06-14

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This memory corruption vulnerability in Apple iOS WebKit allows attackers to execute arbitrary code or cause a denial-of-service by tricking users into visiting a malicious website. With an EPSS score of 0.78362 and its presence in CISA's KEV, this vulnerability is highly likely to be exploited and requires urgent attention.

This vulnerability is actively being exploited in the wild, confirming its critical nature. Attackers can exploit this remotely by enticing users to a specially crafted website.

Recommended Action

Users should update their Apple iOS devices to the latest available version. Additionally, ensure all web browsers and applications that utilize WebKit are kept up-to-date to mitigate this risk.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2016-4657 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2016-4657 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.