← Vulnerability feed

Vulnerability record · CVE-2021-20711 · published 26 April 2021

CVE-2021-20711: Nec aterm wg2600hs firmware os command injection vulnerability

Nec · Aterm Wg2600hs Firmware

Aterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker to execute arbitrary OS commands via unspecified vectors.

9.8 CVSS 3.1 Critical EPSS 1.4% · top 29.4% CWE-78 · OS command injection
9.8CVSS 3.1 base score, v2 10.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Aterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker to execute arbitrary OS commands via unspecified vectors.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://jpn.nec.com/security-info/secinfo/nv21-010.html MitigationVendor Advisory
https://jvn.jp/en/jp/JVN29739718/index.html Third Party Advisory
https://jpn.nec.com/security-info/secinfo/nv21-010.html MitigationVendor Advisory
https://jvn.jp/en/jp/JVN29739718/index.html Third Party Advisory

Track CVE-2021-20711 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2020-5524Nec aterm wg2600hs firmware os command injection vulnerabilityAterm series (Aterm WF1200C firmware Ver1.2.1 and earlier, Aterm WG1200CR firmware Ver1.2.1 and earlier, Aterm WG2600HS firmware Ver1.3.2 and earlier…EPSS 1.0%8.0CVE-2020-5525Nec aterm wg2600hs firmware os command injection vulnerabilityAterm series (Aterm WF1200C firmware Ver1.2.1 and earlier, Aterm WG1200CR firmware Ver1.2.1 and earlier, Aterm WG2600HS firmware Ver1.3.2 and earlier…EPSS 0.87%8.0CVE-2020-5534Nec aterm wg2600hs firmware os command injection vulnerabilityAterm WG2600HS firmware Ver1.3.2 and earlier allows an authenticated attacker on the same network segment to execute arbitrary OS commands with root …EPSS 0.87%7.2CVE-2021-20708Nec aterm wf1200cr firmware os command injection vulnerabilityNEC Aterm devices (Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and earlier, and Aterm WG2600HS firmware Ver1.5.1 a…EPSS 1.2%7.2CVE-2021-20709Nec aterm wf1200cr firmware vulnerabilityImproper validation of integrity check value vulnerability in NEC Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and …EPSS 0.66%7.1CVE-2026-4622Nec aterm wg2600hs firmware os command injection vulnerabilityOS Command Injection vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to execute arbitrary OS commands via network.EPSS 1.2%6.3CVE-2026-4309Nec aterm wg2600hs firmware missing authorization vulnerabilityMissing Authorization vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to get a specific device information and change the setting…EPSS 0.23%6.3CVE-2026-4621Nec aterm wg1200hp4 firmware vulnerabilityHidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.EPSS 0.25%

Source: NIST National Vulnerability Database (record CVE-2021-20711), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.