VulnerabilityModified

CVE-2021-20863

HIGH 8.0EPSS 0.86%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.86%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 8.0 HIGHCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.86% probability · 57th percentile
CISA KEV: Not listed
Weakness: CWE-78
Affected: elecom/wrc-1167gst2 firmware · elecom/wrc-1167gst2a firmware · elecom/wrc-1167gst2h firmware · elecom/wrc-2533gs2-b firmware · elecom/wrc-2533gs2-w firmware · elecom/wrc-1750gs firmware · elecom/wrc-1750gsv firmware · elecom/wrc-1900gst firmware · elecom/wrc-2533gst firmware · elecom/wrc-2533gst2 firmware · elecom/wrc-2533gsta firmware · elecom/wrc-2533gst2sp firmware · elecom/wrc-2533gst2-g firmware · elecom/edwrc-2533gst2 firmware
Source: vultures@jpcert.or.jp

References

https://jvn.jp/en/vu/JVNVU94527926/index.htmlThird Party Advisory
https://www.elecom.co.jp/news/security/20211130-01/Vendor Advisory
https://jvn.jp/en/vu/JVNVU94527926/index.htmlThird Party Advisory
https://www.elecom.co.jp/news/security/20211130-01/Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.