{"id":"CVE-2021-20863","aliases":["EUVD-2021-8272","GHSA-w7r5-r5gp-95jc"],"status":"published","title":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC...","description":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00861,"percentile":0.58975,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2021-12-01T02:15:58Z","modified":"2026-06-17T03:34:33Z","products":[{"vendor":"elecom","product":"edwrc-2533gst2_firmware"},{"vendor":"elecom","product":"wrc-1167gst2_firmware"},{"vendor":"elecom","product":"wrc-1167gst2a_firmware"},{"vendor":"elecom","product":"wrc-1167gst2h_firmware"},{"vendor":"elecom","product":"wrc-1750gs_firmware"},{"vendor":"elecom","product":"wrc-1750gsv_firmware"},{"vendor":"elecom","product":"wrc-1900gst_firmware"},{"vendor":"elecom","product":"wrc-2533gs2-b_firmware"},{"vendor":"elecom","product":"wrc-2533gs2-w_firmware"},{"vendor":"elecom","product":"wrc-2533gst2-g_firmware"},{"vendor":"elecom","product":"wrc-2533gst2_firmware"},{"vendor":"elecom","product":"wrc-2533gst2sp_firmware"},{"vendor":"elecom","product":"wrc-2533gst_firmware"},{"vendor":"elecom","product":"wrc-2533gsta_firmware"},{"vendor":"elecom co.,ltd.","product":"elecom routers"}],"references":[{"url":"https://www.elecom.co.jp/news/security/20211130-01/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU94527926/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20863"},{"url":"https://github.com/advisories/GHSA-w7r5-r5gp-95jc"}],"sources":{"cve":[{"id":"CVE-2021-20863","description":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.","status":"published","published":"2021-12-01T02:15:58Z","modified":"2024-08-03T17:53:23.031Z","updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2021-8272","description":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.","status":"published","published":"2021-12-01T02:15:58Z","modified":"2024-08-03T17:53:23Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-w7r5-r5gp-95jc","title":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC...","description":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.","status":"published","published":"2021-12-02T00:00:55Z","modified":"2023-02-01T05:06:26Z","cwes":["CWE-78"],"updated_at":"2026-11-02T14:50:21.264393Z"}],"nvd":[{"id":"CVE-2021-20863","description":"OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.","status":"published","published":"2021-12-01T03:15:07.223Z","modified":"2026-06-17T03:34:33.767Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.7,"vector":"AV:A/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}