CVE-2021-20864

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una vulnerabilidad de control de acceso inapropiado en los routers ELECOM (firmware WRC-1167GST2 versiones v1.25 y anteriores, firmware WRC-1167GST2A versiones v1.25 y anteriores, firmware WRC-1167GST2H versiones v1.25 y anteriores, firmware WRC-2533GS2-B versiones v1. 52 y anteriores, firmware WRC-2533GS2-W versiones v1.52 y anteriores, firmware WRC-1750GS versiones v1.03 y anteriores, firmware WRC-1750GSV versiones v2.11 y anteriores, firmware WRC-1900GST versiones v1.03 y anteriores, firmware WRC-2533GST versiones v1.03 y anteriores, firmware WRC-2533GSTA versiones v1.03 y anteriores, firmware WRC-2533GST2 versiones v1.25 y anteriores, firmware WRC-2533GST2SP versiones v1.25 y anteriores, firmware WRC-2533GST2-G versiones v1.25 y anteriores, y firmware EDWRC-2533GST2 versiones v1. 25 y anteriores) permite a un atacante no autentificado adyacente a la red omitir la restricción de acceso, e iniciar el servicio telnet y ejecutar un comando arbitrario del SO por medio de vectores no especificados

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2021-12-01 CVE Published
2024-08-03 CVE Updated
2024-08-16 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (2)

URL	Tag	Source
https://jvn.jp/en/vu/JVNVU94527926/index.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.elecom.co.jp/news/security/20211130-01	2022-07-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Elecom Search vendor "Elecom"	Wrc-1167gst2 Firmware Search vendor "Elecom" for product "Wrc-1167gst2 Firmware"	<= 1.25 Search vendor "Elecom" for product "Wrc-1167gst2 Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-1167gst2 Search vendor "Elecom" for product "Wrc-1167gst2"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-1167gst2a Firmware Search vendor "Elecom" for product "Wrc-1167gst2a Firmware"	<= 1.25 Search vendor "Elecom" for product "Wrc-1167gst2a Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-1167gst2a Search vendor "Elecom" for product "Wrc-1167gst2a"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-1167gst2h Firmware Search vendor "Elecom" for product "Wrc-1167gst2h Firmware"	<= 1.25 Search vendor "Elecom" for product "Wrc-1167gst2h Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-1167gst2h Search vendor "Elecom" for product "Wrc-1167gst2h"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gs2-b Firmware Search vendor "Elecom" for product "Wrc-2533gs2-b Firmware"	<= 1.52 Search vendor "Elecom" for product "Wrc-2533gs2-b Firmware" and version " <= 1.52"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gs2-b Search vendor "Elecom" for product "Wrc-2533gs2-b"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gs2-w Firmware Search vendor "Elecom" for product "Wrc-2533gs2-w Firmware"	<= 1.52 Search vendor "Elecom" for product "Wrc-2533gs2-w Firmware" and version " <= 1.52"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gs2-w Search vendor "Elecom" for product "Wrc-2533gs2-w"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-1750gs Firmware Search vendor "Elecom" for product "Wrc-1750gs Firmware"	<= 1.03 Search vendor "Elecom" for product "Wrc-1750gs Firmware" and version " <= 1.03"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-1750gs Search vendor "Elecom" for product "Wrc-1750gs"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-1750gsv Firmware Search vendor "Elecom" for product "Wrc-1750gsv Firmware"	<= 2.11 Search vendor "Elecom" for product "Wrc-1750gsv Firmware" and version " <= 2.11"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-1750gsv Search vendor "Elecom" for product "Wrc-1750gsv"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-1900gst Firmware Search vendor "Elecom" for product "Wrc-1900gst Firmware"	<= 1.03 Search vendor "Elecom" for product "Wrc-1900gst Firmware" and version " <= 1.03"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-1900gst Search vendor "Elecom" for product "Wrc-1900gst"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gst Firmware Search vendor "Elecom" for product "Wrc-2533gst Firmware"	<= 1.03 Search vendor "Elecom" for product "Wrc-2533gst Firmware" and version " <= 1.03"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gst Search vendor "Elecom" for product "Wrc-2533gst"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gst2 Firmware Search vendor "Elecom" for product "Wrc-2533gst2 Firmware"	<= 1.25 Search vendor "Elecom" for product "Wrc-2533gst2 Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gst2 Search vendor "Elecom" for product "Wrc-2533gst2"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gsta Firmware Search vendor "Elecom" for product "Wrc-2533gsta Firmware"	<= 1.03 Search vendor "Elecom" for product "Wrc-2533gsta Firmware" and version " <= 1.03"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gsta Search vendor "Elecom" for product "Wrc-2533gsta"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gst2sp Firmware Search vendor "Elecom" for product "Wrc-2533gst2sp Firmware"	<= 1.25 Search vendor "Elecom" for product "Wrc-2533gst2sp Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gst2sp Search vendor "Elecom" for product "Wrc-2533gst2sp"	-	-	Safe
Elecom Search vendor "Elecom"	Wrc-2533gst2-g Firmware Search vendor "Elecom" for product "Wrc-2533gst2-g Firmware"	<= 1.25 Search vendor "Elecom" for product "Wrc-2533gst2-g Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Wrc-2533gst2-g Search vendor "Elecom" for product "Wrc-2533gst2-g"	-	-	Safe
Elecom Search vendor "Elecom"	Edwrc-2533gst2 Firmware Search vendor "Elecom" for product "Edwrc-2533gst2 Firmware"	<= 1.25 Search vendor "Elecom" for product "Edwrc-2533gst2 Firmware" and version " <= 1.25"	-	Affected	in	Elecom Search vendor "Elecom"	Edwrc-2533gst2 Search vendor "Elecom" for product "Edwrc-2533gst2"	-	-	Safe