CVE-2021-32508Network attack vector

Arbitrary file disclosure via unfiltered symbolic links

Published Jul 7, 2021 · Updated Sep 16, 2024

Absolute path traversal in QSAN Storage Manager 3.3.1 and earlier allows remote authenticated users to read arbitrary system files. The FileStreaming function accepts a symbolic link in the Url path parameter without filtering the resolved path before opening the target. A low-privileged account with network access to FileStreaming is sufficient, and the reported consequence is file disclosure without data modification or service interruption.

CVSS severity6.5
Medium
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Absolute path traversal in QSAN Storage Manager 3.3.1 and earlier allows remote authenticated users to read arbitrary system files. The FileStreaming function accepts a symbolic link in the Url path parameter without filtering the resolved path before opening the target. A low-privileged account with network access to FileStreaming is sufficient, and the reported consequence is file disclosure without data modification or service interruption.

The record

CVE
CVE-2021-32508
Published
Jul 7, 2021
Updated
Sep 16, 2024
Vendor
QSAN Technology, Inc.
Product
QSAN Storage Manager (QSM)
Classifications
CWE-59, CWE-61, T1005
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

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

Published CVSS scores

6.5TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/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.

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Technologies

Your stack

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Your stack

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