Vulnerability Details : CVE-2021-20864
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.
Products affected by CVE-2021-20864
- cpe:2.3:o:elecom:wrc-2533gst2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-1167gst2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-1167gst2a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-1167gst2h_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-2533gs2-b_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-2533gs2-w_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-1750gs_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-1750gsv_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-1900gst_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-2533gst_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-2533gsta_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-2533gst2sp_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:wrc-2533gst2-g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:elecom:edwrc-2533gst2_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20864
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20864
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
8.3
|
HIGH | AV:A/AC:L/Au:N/C:C/I:C/A:C |
6.5
|
10.0
|
NIST | |
8.8
|
HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
References for CVE-2021-20864
-
https://jvn.jp/en/vu/JVNVU94527926/index.html
JVNVU#94527926: Multiple vulnerabilities in multiple ELECOM routersThird Party Advisory
-
https://www.elecom.co.jp/news/security/20211130-01/
無線LANルーターのセキュリティ向上のためのファームウェアアップデートのお願い - 最新情報 - セキュリティ情報|ELECOMVendor Advisory
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