PLANET Technology PLANET GS-4210-16P2S prior 3.441b260626 SMTP /cgi-bin/dispatcher.cgi web_smtp_test_post os command injection

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.39

Summaryinfo

A vulnerability was found in PLANET Technology PLANET GS-4210-16P2S. It has been classified as very critical. This affects the function web_smtp_test_post of the file /cgi-bin/dispatcher.cgi of the component SMTP Handler. This manipulation causes os command injection. This vulnerability is tracked as CVE-2026-75123. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in PLANET Technology PLANET GS-4210-16P2S and classified as very critical. Affected by this vulnerability is the function web_smtp_test_post of the file /cgi-bin/dispatcher.cgi of the component SMTP Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

PLANET GS-4210-16P2S firmware before 3.441b260626 contains an authenticated OS command injection vulnerability in /cgi-bin/dispatcher.cgi. The web_smtp_test_post handler incorporates a caller-supplied SMTP server value directly into a shell command without sanitization. A remote attacker with administrator web credentials can send a crafted SMTP server value to execute arbitrary operating-system commands on the device.

The advisory is shared at planet.com.tw. This vulnerability is known as CVE-2026-75123 since 08/17/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/28/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 3.441b260626 eliminates this vulnerability.

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.9

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.2
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PLANET GS-4210-16P2S 3.441b260626

Timelineinfo

08/17/2026 CVE reserved
08/28/2026 +11 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/28/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: planet.com.tw
Status: Confirmed

CVE: CVE-2026-75123 (🔒)
GCVE (CVE): GCVE-0-2026-75123
GCVE (VulDB): GCVE-100-396877

Entryinfo

Created: 08/28/2026 22:48
Changes: 08/28/2026 22:48 (76)
Complete: 🔍
Cache ID: 216::103

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