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CVE-2021-20709

HIGH
7.2
CVSS Score
Published: April 26, 2021 at 12:20 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
6 products affected across 1 vendorAterm WG1200CR FirmwareAterm WG2600HS FirmwareAterm WF1200CR Firmware

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Severity
HIGH7.2
Exploit prediction
EPSS 0.7%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Aterm WF1200CR Firmware· NEC
95%
v ≤ 1.3.2
nec-aterm-wf1200cr (same device)
Aterm WG1200CR Firmware· NEC
95%
v ≤ 1.3.3
nec-aterm-wg1200cr (same device)
Aterm WG2600HS Firmware· NEC
95%
v ≤ 1.5.1
nec-aterm-wg2600hs (same device)
Aterm WF1200CR· NECdevice
80%
All versions
Aterm WG1200CR· NECdevice
80%
All versions
Aterm WG2600HS· NECdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCMitigationVendor Advisory
Source: [email protected]
https://jpn.nec.com/security-info/secinfo/nv21-010.html
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://jvn.jp/en/jp/JVN29739718/index.html

CVSS

7.2HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-354

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