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Vulnerability record · CVE-2021-20709 · published 26 April 2021

CVE-2021-20709: Nec aterm wf1200cr firmware vulnerability

Nec · Aterm Wf1200cr Firmware

Improper validation of integrity check value vulnerability in NEC Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and earlier, and Aterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker with an administrative privilege to execute arbitrary OS commands by sending a specially crafted request to a specific URL.

7.2 CVSS 3.1 High EPSS 0.66% · top 50.4% CWE-354 · CWE-354
7.2CVSS 3.1 base score, v2 9.0
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Improper validation of integrity check value vulnerability in NEC Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and earlier, and Aterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker with an administrative privilege to execute arbitrary OS commands by sending a specially crafted request to a specific URL.

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

Affected products

3 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

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Related vulnerabilities

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

9.8CVE-2021-20711Nec aterm wg2600hs firmware os command injection vulnerabilityAterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker to execute arbitrary OS commands via unspecified vectors.EPSS 1.4%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%8.8CVE-2018-16195Nec aterm wf1200cr firmware os command injection vulnerabilityAterm WF1200CR and Aterm WG1200CR (Aterm WF1200CR firmware Ver1.1.1 and earlier, Aterm WG1200CR firmware Ver1.0.1 and earlier) allows an attacker on …EPSS 0.73%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-2018-16194Nec aterm wf1200cr firmware os command injection vulnerabilityAterm WF1200CR and Aterm WG1200CR (Aterm WF1200CR firmware Ver1.1.1 and earlier, Aterm WG1200CR firmware Ver1.0.1 and earlier) allows authenticated a…EPSS 1.4%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%

Source: NIST National Vulnerability Database (record CVE-2021-20709), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.