CVE-2021-20858
CVE-2021-20858 is a medium-severity vulnerability in Elecom Wrc-2533ghbk-i Firmware with a CVSS 3.x base score of 5.4. 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 5.4)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (44th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Elecom Wrc-2533ghbk-i Firmware
- Published:
- Last modified:
Description
Cross-site scripting vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.
Frequently asked questions
- What is CVE-2021-20858?
- Cross-site scripting vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.
- How severe is CVE-2021-20858?
- CVE-2021-20858 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-20858 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-20858?
- CVE-2021-20858 affects Elecom Wrc-2533ghbk-i Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-20858?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-20858 published?
- CVE-2021-20858 was published on 2021-12-01 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:elecom:wrc-2533ghbk-i_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Elecom Wrc-2533ghbk-i Firmware
- CVE-2023-43757 — Medium (CVSS 6.5): Inadequate encryption strength vulnerability in multiple routers provided by ELECOM CO.,LTD. and LOGITEC CORPORATION…
- CVE-2021-20857 — Medium (CVSS 5.4): Cross-site scripting vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows a remote…
All CVEs affecting Elecom Wrc-2533ghbk-i Firmware →
Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities
- CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
- CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
- CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
- CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
- CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
- CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…
Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →