How severe is CVE-2021-32535?

CVE-2021-32535 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32535 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32535?

CVE-2021-32535 affects Qsan Sanos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32535?

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

When was CVE-2021-32535 published?

CVE-2021-32535 was published on 2021-07-07 and last updated on 2026-06-17.

CVE-2021-32535

CVE-2021-32535 is a critical-severity vulnerability in Qsan Sanos with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (69th 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

The vulnerability of hard-coded default credentials in QSAN SANOS allows unauthenticated remote attackers to obtain administrator’s permission and execute arbitrary functions. The referred vulnerability has been solved with the updated version of QSAN SANOS v2.1.0.

Frequently asked questions

What is CVE-2021-32535?: The vulnerability of hard-coded default credentials in QSAN SANOS allows unauthenticated remote attackers to obtain administrator’s permission and execute arbitrary functions. The referred vulnerability has been solved with the updated version of QSAN SANOS v2.1.0.
How severe is CVE-2021-32535?: CVE-2021-32535 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32535 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32535?: CVE-2021-32535 affects Qsan Sanos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32535?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-32535 published?: CVE-2021-32535 was published on 2021-07-07 and last updated on 2026-06-17.

References

https://www.twcert.org.tw/tw/cp-132-4892-768d9-1.html

Affected products (1)

cpe:2.3:a:qsan:sanos:*:*:*:*:*:*:*:*

More vulnerabilities in Qsan Sanos

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…
CVE-2021-32521 — High (CVSS 7.3): Use of MAC address as an authenticated password in QSAN Storage Manager, XEVO, SANOS allows local attackers to escalate…

All CVEs affecting Qsan Sanos →

Other CWE-798 (Use of Hard-coded Credentials) vulnerabilities

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CVE-2025-7503 — Critical (CVSS 10.0): An OEM IP camera manufactured by Shenzhen Liandian Communication Technology LTD exposes a Telnet service (port 23) with…
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