CVE-2023-27935Public exploitNetwork attack vector

Code execution via association-group integer overflow

Published May 8, 2023 · Updated Nov 4, 2025

Heap overflow in Apple macOS dcerpc allows remote authenticated users to execute arbitrary code via crafted DCERPC BIND requests. A 16-bit association-group count wraps during table growth, allocating a small heap buffer before the old table is copied into it. Network exploitation requires authentication, and local socket access also reaches the flaw on Big Sur before 11.7.5, Monterey before 12.6.4, and Ventura before 13.3.

CVSS severity7.5
High
EPSS probability1.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Apple macOS dcerpc allows remote authenticated users to execute arbitrary code via crafted DCERPC BIND requests. A 16-bit association-group count wraps during table growth, allocating a small heap buffer before the old table is copied into it. Network exploitation requires authentication, and local socket access also reaches the flaw on Big Sur before 11.7.5, Monterey before 12.6.4, and Ventura before 13.3.

The record

CVE
CVE-2023-27935
Published
May 8, 2023
Updated
Nov 4, 2025
Vendor
Apple
Product
macOS
Classifications
CWE-190, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <11.7
  2. Affected versionversion=unspecified <12.6
  3. Affected versionversion=unspecified <13.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Apple · macOSversion=unspecified <11.7; version=unspecified <12.6; version=unspecified <13.3

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Cisco TalosCVSS:3.1/AV:N/AC:H/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1210Exploitation of Remote Services

Public exploit references

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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