NVD

CVE-2021-20863 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 8.0 HIGH

Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 7.7 HIGH

Vector: (AV:A/AC:L/Au:S/C:C/I:C/A:C)

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://jvn.jp/en/vu/JVNVU94527926/index.html	CVE, JPCERT/CC	Third Party Advisory
https://www.elecom.co.jp/news/security/20211130-01/	CVE, JPCERT/CC	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-78	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Initial Analysis by NIST 12/02/2021 11:35:07 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added	CVSS V2		NIST (AV:A/AC:L/Au:S/C:C/I:C/A:C)
Added	CWE		NIST CWE-78
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:edwrc-2533gst2_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:edwrc-2533gst2:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-1167gst2_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:wrc-1167gst2:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-1167gst2a_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:wrc-1167gst2a:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-1167gst2h_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:wrc-1167gst2h:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-1750gs_firmware::::::::* versions up to (including) 1.03 OR cpe:2.3:h:elecom:wrc-1750gs:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-1750gsv_firmware::::::::* versions up to (including) 2.11 OR cpe:2.3:h:elecom:wrc-1750gsv:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-1900gst_firmware::::::::* versions up to (including) 1.03 OR cpe:2.3:h:elecom:wrc-1900gst:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gs2-b_firmware::::::::* versions up to (including) 1.52 OR cpe:2.3:h:elecom:wrc-2533gs2-b:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gs2-w_firmware::::::::* versions up to (including) 1.52 OR cpe:2.3:h:elecom:wrc-2533gs2-w:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gst2-g_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:wrc-2533gst2-g:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gst2_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:wrc-2533gst2:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gst2sp_firmware::::::::* versions up to (including) 1.25 OR cpe:2.3:h:elecom:wrc-2533gst2sp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gst_firmware::::::::* versions up to (including) 1.03 OR cpe:2.3:h:elecom:wrc-2533gst:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:elecom:wrc-2533gsta_firmware::::::::* versions up to (including) 1.03 OR cpe:2.3:h:elecom:wrc-2533gsta:-:::::::*
Changed	Reference Type	https://jvn.jp/en/vu/JVNVU94527926/index.html No Types Assigned	https://jvn.jp/en/vu/JVNVU94527926/index.html Third Party Advisory
Changed	Reference Type	https://www.elecom.co.jp/news/security/20211130-01/ No Types Assigned	https://www.elecom.co.jp/news/security/20211130-01/ Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-20863
NVD Published Date:
11/30/2021
NVD Last Modified:
06/16/2026
Source:
JPCERT/CC

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-20863 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by JPCERT/CC 6/16/2026 11:34:33 PM

CVE Modified by CVE 11/21/2024 12:47:18 AM

CVE Modified by JPCERT/CC 5/14/2024 4:07:05 AM

Initial Analysis by NIST 12/02/2021 11:35:07 AM

Quick Info