Is CVE-2026-28877 in the CISA KEV catalog?

No. CVE-2026-28877 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-28877?

CVE-2026-28877 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2026-28877?

CVE-2026-28877 has an EPSS score of 0.17% (6th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28877?

Update iOS to 18.7.9 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2026-28877

MEDIUM

5.5

CVSS v3

NVD

Description

An authorization issue was addressed with improved state management. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, visionOS 26.4, watchOS 26.4. An app may be able to access sensitive user data.

CWE-200Information Exposure

How to fix

Remediation Available

iOSApple

Fixed in:18.7.9127111

Fixed in:26.4126792

macOS SequoiaApple

Fixed in:15.7.5126795

macOS SonomaApple

Fixed in:14.8.5126796

macOS TahoeApple

Fixed in:26.4126794

visionOSApple

Fixed in:26.4126799

watchOSApple

Fixed in:26.4126798

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

6thpercentile

Low risk: more likely to be exploited than 6% of all known CVEs.

References

Vendor Advisory5

Other references2

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

Embed a live status badge for CVE-2026-28877

Markdown

[![CVE-2026-28877](https://tridentstack.com/cve/badge/CVE-2026-28877.svg)](https://tridentstack.com/cve/CVE-2026-28877)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-28877"><img src="https://tridentstack.com/cve/badge/CVE-2026-28877.svg" alt="CVE-2026-28877"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-11.