Cross-site scripting in ELECOM LAN router
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
EPSS 0.00605 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ELECOM CO.,LTD. | ELECOM LAN router | WRC-2533GHBK-I firmware v1.20 and prior | — | No fix listed | CNA |
- ELECOM LAN router VendorELECOM CO.,LTD. Affected WRC-2533GHBK-I firmware v1.20 and prior Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:elecom:wrc-2533ghbk-i_firmware:*:*:*:*:*:*:*:* | up to 1.20 | Vulnerable | ELECOM CO.,LTD. |
| cpe:2.3:h:elecom:wrc-2533ghbk-i:-:*:*:*:*:*:*:* | not specified by NVD | Running on | ELECOM CO.,LTD. |
- cpe:2.3:o:elecom:wrc-2533ghbk-i_firmware:*:*:*:*:*:*:*:* Versions up to 1.20 Vulnerable ·ELECOM CO.,LTD.
- cpe:2.3:h:elecom:wrc-2533ghbk-i:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·ELECOM CO.,LTD.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20858
- 2026-10-03 Alias added: GHSA-5q7q-7mx2-p7hf
References
More ELECOM CO.,LTD. Wrc-2533ghbk-i Firmware vulnerabilities
- TI-2023-23457 Inadequate encryption strength vulnerability in multiple routers provided by ELECOM… CVSS 3.1MEDIUM 6.5
- TI-2021-04071 Cross-site scripting in ELECOM LAN router CVSS 3.1MEDIUM 5.4
Sources
- CVE-2021-20858 · CVE Program
- CVE-2021-20858 · NVD
- FIRST EPSS
- GHSA-5q7q-7mx2-p7hf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences