CVE-2026-43818

HIGH 8.8 ALL-YEARS

Published 2026-07-27 · Last modified 2026-08-17 · apple · NVD: Modified

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Processing a maliciously crafted image may lead to arbitrary code execution.

ELEVATED IMPACT

Severe if exploited (CVSS 8.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 46th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

8.8CVSS 3.1 · HIGH · ADP

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
⚠User interaction: A user must take an action (click / open a file)
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Apple

Products Ios And Ipados Macos Ipados Iphone Os

Weakness (CWE)

CWE-190: Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Apple	Ipados	< 26.6
Apple	Iphone Os	< 26.6
Apple	Macos	≥ 14.0 and < 14.8.8
Apple	Macos	≥ 15.0 and < 15.7.8
Apple	Macos	≥ 26.0 and < 26.6

All CVSS metrics

HIGH 8.8 v3.1 · ADP Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
HIGH 8.8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Advisories

https://support.apple.com/en-us/128066 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-08-17T21:30:47.316Z
NVD · CVE-2026-43818 · Updated 2026-08-17T22:17:13.547
https://support.apple.com/en-us/128067 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-08-17T21:30:47.316Z
NVD · CVE-2026-43818 · Updated 2026-08-17T22:17:13.547
https://support.apple.com/en-us/128071 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-08-17T21:30:47.316Z
NVD · CVE-2026-43818 · Updated 2026-08-17T22:17:13.547
https://support.apple.com/en-us/128072 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-08-17T21:30:47.316Z
NVD · CVE-2026-43818 · Updated 2026-08-17T22:17:13.547
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-49544 ADVISORYEUVD · EUVD-2026-49544

Technical & other

https://support.apple.com/en-us/148287CVE record · apple · Updated 2026-08-17T21:30:47.316Z
NVD · CVE-2026-43818 · Updated 2026-08-17T22:17:13.547

Sources: NVD · CVE.org · All sources and attribution · EPSS