Is CVE-2026-28866 in the CISA KEV catalog?

No. CVE-2026-28866 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-28866?

CVE-2026-28866 has a CVSS v3 base score of 6.2 (MEDIUM).

What is the EPSS score for CVE-2026-28866?

CVE-2026-28866 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28866?

Update iOS to 26.4 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2026-28866

MEDIUM

6.2

CVSS v3

NVD

Description

This issue was addressed with improved validation of symlinks. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to access sensitive user data.

CWE-59Link Following

How to fix

Remediation Available

iOSApple

Fixed in:26.4126792

Fixed in:18.7.7126793

macOS SequoiaApple

Fixed in:15.7.5126795

macOS SonomaApple

Fixed in:14.8.5126796

macOS TahoeApple

Fixed in:26.4126794

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Vendor Advisory5

Related Vulnerabilities

Other CWE-59 (Link Following) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-30333	High	7.5	99%	KEV + Ransom	Fix
CVE-2021-21300	High	8.0	89%	-	Fix
CVE-2021-32610	High	7.1	73%	-	Fix
CVE-2020-36193	High	7.5	71%	KEV	Fix
CVE-2023-40028	Medium	4.9	58%	-	Fix
CVE-2020-0787	High	7.8	43%	KEV + Ransom	-

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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 2026-03-25.