CVE-2026-43817: An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app

mediumCVSS 5.5CVE-2026-43817

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.5
Published: 2026-07-27
Last updated: 2026-07-29
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-43817

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-438170.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-43817	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Apple iOS and iPadOS: Multiple vulnerabilitiescert-bund
unknownNCSC-2026-0266 [1.00] [M/H] Vulnerabilities fixed in Apple iOS and iPadOSncsc-nl
unknownMultiple vulnerabilities in Apple products (July 28, 2026)cert-fr-avis

Recent advisories for An out-of-bounds read

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-67306: FreeRDP versions 3.28.0 and earlier contain an out-of-bounds read vulnerability in the RDP6 pl…nvd · 2026-08-01
highCVE-2026-67301: FreeRDP before 3.29.0 contains out-of-bounds read vulnerabilities in the async update message …nvd · 2026-08-01
highCVE-2026-67291: FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a heap out-of-bounds read in upda…nvd · 2026-08-01
highCVE-2026-67290: FreeRDP before 3.29.0 contains a heap out-of-bounds read vulnerability in the TSMF FFmpeg deco…nvd · 2026-08-01
lowCVE-2026-66401: FreeRDP before 3.29.0 contains an out-of-bounds heap read vulnerability in the UVC H.264 exten…nvd · 2026-08-01
mediumGHSA-ff84-5f28-78qj: re2: Out-of-bounds heap read in `exec`/`test`/`match` via attacker-influenced `lastIndex`…ghsa · 2026-07-31