CVE-2021-32518Network attack vector

Arbitrary file disclosure via unfiltered symlink

Published Jul 7, 2021 · Updated Sep 16, 2024

Symlink following in share_link in QSAN Storage Manager 3.3.1 and earlier allows remote attackers to read arbitrary system files. The share-link function fails to filter special characters in its parameters and follows an attacker-supplied symbolic link when resolving a requested file. No authentication is required, and the documented consequence is arbitrary file disclosure without reported file modification or service interruption.

CVSS severity7.5
High
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Symlink following in share_link in QSAN Storage Manager 3.3.1 and earlier allows remote attackers to read arbitrary system files. The share-link function fails to filter special characters in its parameters and follows an attacker-supplied symbolic link when resolving a requested file. No authentication is required, and the documented consequence is arbitrary file disclosure without reported file modification or service interruption.

The record

CVE
CVE-2021-32518
Published
Jul 7, 2021
Updated
Sep 16, 2024
Vendor
QSAN Technology, Inc.
Product
QSAN Storage Manager (QSM)
Classifications
CWE-61, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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 <=3.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QSAN Technology, Inc. · QSAN Storage Manager (QSM)version=unspecified <=3.3.1

Published CVSS scores

7.5TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/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.

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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

CWE-61UNIX Symbolic Link (Symlink) Following
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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