CVSS 3.1
8.8 highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-20864
High (8.8) in elecom. EPSS 0.5% chance of exploitation in the next 30 days.
Improper access control 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 unauthenticated attacker to bypass access restriction, and to start the telnet service and execute an arbitrary OS command via unspecified vectors.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- elecom:edwrc-2533gst2_firmware
- elecom:wrc-1167gst2_firmware
- elecom:wrc-1167gst2a_firmware
- elecom:wrc-1167gst2h_firmware
- elecom:wrc-1750gs_firmware
- elecom:wrc-1750gsv_firmware
- elecom:wrc-1900gst_firmware
- elecom:wrc-2533gs2-b_firmware
- elecom:wrc-2533gs2-w_firmware
- elecom:wrc-2533gst2-g_firmware
- elecom:wrc-2533gst2_firmware
- elecom:wrc-2533gst2sp_firmware
- elecom:wrc-2533gst_firmware
- elecom:wrc-2533gsta_firmware