CVE-2026-78796Public exploitNetwork attack vector

Unauthenticated code execution via CGI parameter-name evaluation

Published Oct 9, 2026 · Updated Oct 9, 2026

Command injection in Netcore B11 1.3.241114.024540 and earlier allows remote attackers to execute code via upgrade-CGI requests. The www/cgi-bin/upgrade script passes attacker-controlled query parameter names into shell eval rather than treating them as data, allowing commands to bypass its character filtering. Exploitation requires network access to the CGI but no credentials, and executes commands in the CGI process context.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Netcore B11 1.3.241114.024540 and earlier allows remote attackers to execute code via upgrade-CGI requests. The www/cgi-bin/upgrade script passes attacker-controlled query parameter names into shell eval rather than treating them as data, allowing commands to bypass its character filtering. Exploitation requires network access to the CGI but no credentials, and executes commands in the CGI process context.

The record

CVE
CVE-2026-78796
Published
Oct 9, 2026
Updated
Oct 9, 2026
Vendor
Netcore
Product
B11
Classifications
T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Netcore · B11version=n/a

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1059.004Unix Shell

Public exploit references

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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