How severe is CVE-2021-32521?

CVE-2021-32521 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-32521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32521?

CVE-2021-32521 primarily affects Qsan Sanos. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-32521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-32521 published?

CVE-2021-32521 was published on 2021-07-07 and last updated on 2026-06-17.

CVE-2021-32521

CVE-2021-32521 is a high-severity vulnerability in Qsan Sanos with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Qsan Sanos
Published: 2021-07-07
Last modified: 2026-06-17

Description

Use of MAC address as an authenticated password in QSAN Storage Manager, XEVO, SANOS allows local attackers to escalate privileges. Suggest contacting with QSAN and refer to recommendations in QSAN Document.

Frequently asked questions

What is CVE-2021-32521?: Use of MAC address as an authenticated password in QSAN Storage Manager, XEVO, SANOS allows local attackers to escalate privileges. Suggest contacting with QSAN and refer to recommendations in QSAN Document.
How severe is CVE-2021-32521?: CVE-2021-32521 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-32521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32521?: CVE-2021-32521 primarily affects Qsan Sanos. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-32521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32521 published?: CVE-2021-32521 was published on 2021-07-07 and last updated on 2026-06-17.

References

https://www.twcert.org.tw/tw/cp-132-4877-7b696-1.html

Affected products (3)

cpe:2.3:a:qsan:sanos:*:*:*:*:*:*:*:*
cpe:2.3:a:qsan:storage_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:qsan:xevo:*:*:*:*:*:*:*:*

More vulnerabilities in Qsan Sanos

CVE-2021-32535 — Critical (CVSS 9.8): The vulnerability of hard-coded default credentials in QSAN SANOS allows unauthenticated remote attackers to obtain…
CVE-2021-32534 — Critical (CVSS 9.8): QSAN SANOS factory reset function does not filter special parameters. Remote attackers can use this vulnerability to…
CVE-2021-32533 — Critical (CVSS 9.8): The QSAN SANOS setting page does not filter special parameters. Remote attackers can use this vulnerability to inject…
CVE-2021-32529 — Critical (CVSS 9.8): Command injection vulnerability in QSAN XEVO, SANOS allows remote unauthenticated attackers to execute arbitrary…
CVE-2021-32522 — Critical (CVSS 9.8): Improper restriction of excessive authentication attempts vulnerability in QSAN Storage Manager, XEVO, SANOS allows…
CVE-2021-32519 — Critical (CVSS 9.8): Use of password hash with insufficient computational effort vulnerability in QSAN Storage Manager, XEVO, SANOS allows…

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