CVE-2026-4622: OS Command Injection in Nec Aterm Gb1200pe Firmware

20

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 1.2% (30-day exploitation probability)+10
Technical severity (critical)+10

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

1.22%

ahead of 68% of scored CVEs · Oct 14, 2026

Affects

Nec

Aterm Gb1200pe Firmware and 17 more

CVSS base

9.8

Critical · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

No

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Nec Aterm Gb1200pe Firmware, Nec Aterm Wf1200cr Firmware, Nec Aterm Wg1200cr Firmware…).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Nec	Aterm Gb1200pe Firmware	< 1.3.1	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wf1200cr Firmware	< 1.6.0	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wg1200cr Firmware	< 1.5.0	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wg2600hm4 Firmware	< 1.4.2	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wg2600hp4 Firmware	< 1.4.2	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wg2600hs Firmware	< 1.7.2	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wg2600hs2 Firmware	< 1.3.2	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wx3000hp Firmware	< 2.5.0	Vulnerable	NIST National Vulnerability Database
Nec	Aterm Wx3000hp2 Firmware	< 1.3.2	Vulnerable	NIST National Vulnerability Database
NEC Platforms, Ltd.	Aterm GB1200PE	version Before Ver. 1.3.1	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WF1200CR	version Before Ver. 1.6.0	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WG1200CR	version Before Ver. 1.5.0	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WG2600HM4	version Before Ver. 1.4.2	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WG2600HP4	version Before Ver. 1.4.2	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WG2600HS	version Before Ver. 1.7.2	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WG2600HS2	version Before Ver. 1.3.2	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WX3000HP	version Before Ver. 2.5.0	Vulnerable	CVE Program (cve.org) e CISA ADP
NEC Platforms, Ltd.	Aterm WX3000HP2	version Before Ver. 1.3.2	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.1	CVSS 4.0	High	—	—	psirt-info@cyber.jp.nec.com via NIST National Vulnerability Database
7.1	CVSS 4.0	High	—	—	NEC via CVE Program (cve.org) e CISA ADP
9.8	CVSS 3.1	Critical	3.9	5.9	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-78 · OS Command Injection

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 1.22%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Look for parameters with command/query metacharacters and unexpected child processes of the service.

web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · nec platforms, ltd./aterm wg2600hs, nec platforms, ltd./aterm wf1200cr, nec platforms, ltd./aterm wg1200cr, nec platform
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 9.8
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Mar 27, 2026 · NEC

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

jpn.nec.com/security-info/secinfo/nv26-001_en.html
Vendor Advisory, NIST National Vulnerability Database

Elsewhere on this site

Nec
every CVE for this vendor

Injection
same class

CWE-78
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-6059 Cross-site Scripting (XSS) in NEC Platforms, Ltd. Aterm WX1800HP May 25, 2026
Medium CVE-2026-4309 Missing Authorization in Nec Aterm Wg2600hs Firmware Mar 27, 2026
Medium CVE-2026-4621 Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker… Mar 27, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-4622 is "OS Command Injection in Nec Aterm Gb1200pe Firmware", rated Critical. It affects Aterm Gb1200pe Firmware (Nec); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.8 describes technical severity. EPSS 1.22% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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