CVE-2026-43830Network attack vector

Arbitrary command execution during firmware verification

Published Jul 31, 2026 · Updated Jul 31, 2026

Command injection in an undisclosed product allows remote attackers to execute arbitrary commands during firmware upgrade verification. The withdrawn CSA description identified the firmware upgrade file-verification process as the vulnerable locus but did not disclose the command construction or untrusted field that reaches it. The current CNA record withholds the vendor, product, versions, and mechanism; CISA's retained vector indicates unauthenticated network reachability, while the earlier CSA vector required high privileges.

CVSS severity9.8
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in an undisclosed product allows remote attackers to execute arbitrary commands during firmware upgrade verification. The withdrawn CSA description identified the firmware upgrade file-verification process as the vulnerable locus but did not disclose the command construction or untrusted field that reaches it. The current CNA record withholds the vendor, product, versions, and mechanism; CISA's retained vector indicates unauthenticated network reachability, while the earlier CSA vector required high privileges.

The record

CVE
CVE-2026-43830
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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