CVE-2026-86879Network attack vector

Service interruption via improper Baseband input validation

Published Sep 14, 2026 · Updated Sep 14, 2026

Denial of service in Baseband in Apple iOS before 27 allows remote attackers to interrupt device service via crafted cellular input. The Baseband component inadequately validates untrusted input, but Apple has not disclosed the input format or resulting failure mode. Reachability requires remote access to the cellular baseband; the documented consequence is denial of service, with no reported data access or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Baseband in Apple iOS before 27 allows remote attackers to interrupt device service via crafted cellular input. The Baseband component inadequately validates untrusted input, but Apple has not disclosed the input format or resulting failure mode. Reachability requires remote access to the cellular baseband; the documented consequence is denial of service, with no reported data access or code execution.

The record

CVE
CVE-2026-86879
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1642
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <27

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1642Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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