CVE-2022-26776Network attack vector

Application crash or arbitrary code execution

Published May 26, 2022 · Updated May 30, 2025

A buffer-bounds flaw in macOS Big Sur before 11.6.6 and Monterey before 12.4 allows attackers to crash apps or execute arbitrary code. Apple states only that improved checks corrected libresolv; public records do not identify the affected function, untrusted input, or faulty operation. Published scoring treats the path as remote, unauthenticated, and interaction-free, while the consequence remains within the application using the flawed resolver library.

CVSS severity9.8
Critical
EPSS probability2.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A buffer-bounds flaw in macOS Big Sur before 11.6.6 and Monterey before 12.4 allows attackers to crash apps or execute arbitrary code. Apple states only that improved checks corrected libresolv; public records do not identify the affected function, untrusted input, or faulty operation. Published scoring treats the path as remote, unauthenticated, and interaction-free, while the consequence remains within the application using the flawed resolver library.

The record

CVE
CVE-2022-26776
Published
May 26, 2022
Updated
May 30, 2025
Vendor
Apple
Product
macOS
Classifications
CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2022CVE publishedPublication date reported by the CVE source.
  2. May 30, 2025Record 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=unspecified <11.6
  2. Affected versionversion=unspecified <12.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=unspecified <11.6; version=unspecified <12.4

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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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