CVE-2022-3592Network attack vector

Authenticated filesystem escape via incomplete symlink validation

Published Jan 12, 2023 · Updated Apr 8, 2025

Symlink following in Samba 4.17.0 through 4.17.1 allows remote authenticated users to access files outside an SMB share. smbd's user-space symlink target check misses a corner case and follows an attacker-created link beyond the administrator-configured share path. Reachability requires share write access through SMB1 Unix extensions or an NFS export of the same filesystem area; SMB1 is disabled by default.

CVSS severity5.4
Medium
EPSS probability2.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Symlink following in Samba 4.17.0 through 4.17.1 allows remote authenticated users to access files outside an SMB share. smbd's user-space symlink target check misses a corner case and follows an attacker-created link beyond the administrator-configured share path. Reachability requires share write access through SMB1 Unix extensions or an NFS export of the same filesystem area; SMB1 is disabled by default.

The record

CVE
CVE-2022-3592
Published
Jan 12, 2023
Updated
Apr 8, 2025
Vendor
PPP Project
Product
Samba
Classifications
CWE-59, CWE-61, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=Affects samba since 4.17.0, Fixed samba 4.17.2.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PPP Project · Sambaversion=Affects samba since 4.17.0, Fixed samba 4.17.2.

Published CVSS scores

5.4Samba TeamCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-61UNIX Symbolic Link (Symlink) Following
T1005Data from Local System

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo