Authenticated OS command execution via undisclosed injection
Published Mar 27, 2026 · Updated Mar 27, 2026
OS command injection in NEC Aterm router firmware allows remote authenticated users to execute arbitrary OS commands over the network. NEC has not disclosed the affected request, parameter, or command-building operation that passes attacker-controlled input to the operating system. Exploitation requires high privileges, high attack complexity, and active user interaction; successful exploitation permits reading or altering router data and interrupting service.
Summary
What happened
OS command injection in NEC Aterm router firmware allows remote authenticated users to execute arbitrary OS commands over the network. NEC has not disclosed the affected request, parameter, or command-building operation that passes attacker-controlled input to the operating system. Exploitation requires high privileges, high attack complexity, and active user interaction; successful exploitation permits reading or altering router data and interrupting service.
The record
- CVE
- CVE-2026-4622
- Published
- Mar 27, 2026
- Updated
- Mar 27, 2026
- Vendor
- NEC Platforms, Ltd.
- Product
- Aterm WG2600HM4
- Classifications
- CWE-78, T1059
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Mar 27, 2026CVE publishedPublication date reported by the CVE source.
- Mar 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Before Ver. 1.4.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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