How severe is CVE-2022-21799?

CVE-2022-21799 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2022-21799 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21799?

CVE-2022-21799 affects Elecom Wrc-300febk-r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21799?

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

When was CVE-2022-21799 published?

CVE-2022-21799 was published on 2022-02-08 and last updated on 2026-06-17.

CVE-2022-21799

CVE-2022-21799 is a medium-severity vulnerability in Elecom Wrc-300febk-r Firmware with a CVSS 3.x base score of 5.2. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.2)
CVSS v2: 2.9
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Elecom Wrc-300febk-r Firmware
Published: 2022-02-08
Last modified: 2026-06-17

Description

Cross-site scripting vulnerability in ELECOM LAN router WRC-300FEBK-R firmware v1.13 and earlier allows an attacker on the adjacent network to inject an arbitrary script via unspecified vectors.

Frequently asked questions

What is CVE-2022-21799?: Cross-site scripting vulnerability in ELECOM LAN router WRC-300FEBK-R firmware v1.13 and earlier allows an attacker on the adjacent network to inject an arbitrary script via unspecified vectors.
How severe is CVE-2022-21799?: CVE-2022-21799 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2022-21799 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21799?: CVE-2022-21799 affects Elecom Wrc-300febk-r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21799?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-21799 published?: CVE-2022-21799 was published on 2022-02-08 and last updated on 2026-06-17.

References

Affected products (1)

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

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