How severe is CVE-2021-20646?

CVE-2021-20646 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-20646 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20646?

CVE-2021-20646 affects Elecom Wrc-300febk-a Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20646?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20646 published?

CVE-2021-20646 was published on 2021-02-12 and last updated on 2026-06-17.

CVE-2021-20646

CVE-2021-20646 is a medium-severity vulnerability in Elecom Wrc-300febk-a Firmware with a CVSS 3.x base score of 6.5. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Elecom Wrc-300febk-a Firmware
Published: 2021-02-12
Last modified: 2026-06-17

Description

Cross-site request forgery (CSRF) vulnerability in ELECOM WRC-300FEBK-A allows remote attackers to hijack the authentication of administrators and execute an arbitrary request via unspecified vector. As a result, the device settings may be altered and/or telnet daemon may be started.

Frequently asked questions

What is CVE-2021-20646?: Cross-site request forgery (CSRF) vulnerability in ELECOM WRC-300FEBK-A allows remote attackers to hijack the authentication of administrators and execute an arbitrary request via unspecified vector. As a result, the device settings may be altered and/or telnet daemon may be started.
How severe is CVE-2021-20646?: CVE-2021-20646 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-20646 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20646?: CVE-2021-20646 affects Elecom Wrc-300febk-a Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20646?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20646 published?: CVE-2021-20646 was published on 2021-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:elecom:wrc-300febk-a_firmware:-:*:*:*:*:*:*:*

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