{"cve":"CVE-2021-20680","nvd":{"published":"2021-04-26T01:15:07.770","modified":"2026-06-17T03:34:14.260","status":"Modified","description":"Cross-site scripting vulnerability in NEC Aterm devices (Aterm WG1900HP2 firmware Ver.1.3.1 and earlier, Aterm WG1900HP firmware Ver.2.5.1 and earlier, Aterm WG1800HP4 firmware Ver.1.3.1 and earlier, Aterm WG1800HP3 firmware Ver.1.5.1 and earlier, Aterm WG1200HS2 firmware Ver.2.5.0 and earlier, Aterm WG1200HP3 firmware Ver.1.3.1 and earlier, Aterm WG1200HP2 firmware Ver.2.5.0 and earlier, Aterm W1200EX firmware Ver.1.3.1 and earlier, Aterm W1200EX-MS firmware Ver.1.3.1 and earlier, Aterm WG1200HS firmware all versions Aterm WG1200HP firmware all versions Aterm WF800HP firmware all versions Aterm WF300HP2 firmware all versions Aterm WR8165N firmware all versions Aterm W500P firmware all versions, and Aterm W300P firmware all versions) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://jpn.nec.com/security-info/secinfo/nv21-008.html","https://jvn.jp/en/jp/JVN67456944/index.html","https://jpn.nec.com/security-info/secinfo/nv21-008.html","https://jvn.jp/en/jp/JVN67456944/index.html"],"products":["nec:aterm_w1200ex-ms_firmware","nec:aterm_w1200ex_firmware","nec:aterm_w300p_firmware","nec:aterm_w500p_firmware","nec:aterm_wf300hp2_firmware","nec:aterm_wf800hp_firmware","nec:aterm_wg1200hp2_firmware","nec:aterm_wg1200hp3_firmware","nec:aterm_wg1200hp_firmware","nec:aterm_wg1200hs2_firmware","nec:aterm_wg1200hs3_firmware","nec:aterm_wg1200hs_firmware","nec:aterm_wg1800hp3_firmware","nec:aterm_wg1800hp4_firmware","nec:aterm_wg1900hp2_firmware","nec:aterm_wg1900hp_firmware","nec:aterm_wr8165n_firmware"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-20680","score":0.00796,"percentile":0.56479,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}