How severe is CVE-2021-22661?

CVE-2021-22661 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-22661 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22661?

CVE-2021-22661 primarily affects Prosoft-technology Icx35-hwc-a Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22661?

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-2021-22661 published?

CVE-2021-22661 was published on 2021-02-26 and last updated on 2026-06-17.

CVE-2021-22661

CVE-2021-22661 is a high-severity vulnerability in Prosoft-technology Icx35-hwc-a Firmware with a CVSS 3.x base score of 7.5. 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-264.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Prosoft-technology Icx35-hwc-a Firmware
Published: 2021-02-26
Last modified: 2026-06-17

Description

Changing the password on the module webpage does not require the user to type in the current password first. Thus, the password could be changed by a user or external process without knowledge of the current password on the ICX35-HWC-A and ICX35-HWC-E (Versions 1.9.62 and prior).

Frequently asked questions

What is CVE-2021-22661?: Changing the password on the module webpage does not require the user to type in the current password first. Thus, the password could be changed by a user or external process without knowledge of the current password on the ICX35-HWC-A and ICX35-HWC-E (Versions 1.9.62 and prior).
How severe is CVE-2021-22661?: CVE-2021-22661 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-22661 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22661?: CVE-2021-22661 primarily affects Prosoft-technology Icx35-hwc-a Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22661?: 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-2021-22661 published?: CVE-2021-22661 was published on 2021-02-26 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-056-04

Affected products (2)

cpe:2.3:o:prosoft-technology:icx35-hwc-a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:prosoft-technology:icx35-hwc-e_firmware:*:*:*:*:*:*:*:*

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