VulnerabilityPublished 16 Feb 2026Updated 23 Feb 2026

CVE-2026-2533: Tosei Self-service Washing Machine · Command Injection

Affects Tosei Self-service Washing MachineSource CVE Database V5

Public exploit available · CVSS 6.9 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 3.1% chance of exploitation in 30 days – higher than 88% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
ToseiSelf-service Washing Machine	Affected =4.02	Fixed in–

AI-suggested

2) Disable or restrict access to the /cgi-bin/tosei_datasend.php interface from untrusted networks, especially the internet. 3) Employ network intrusion detection/prevention systems (IDS/IPS) to monitor and block suspicious commands or traffic patterns targeting the vulnerable parameter adr_txt_1. 4) Regularly audit and monitor device logs for unusual activity indicative of exploitation attempts. 5) If possible, replace or upgrade devices to versions without this vulnerability or from vendors with active security support. 6) Educate facility management staff about the risks and signs of compromise. 7) Consider deploying application-layer firewalls or reverse proxies to sanitize inputs before they reach the vulnerable CGI script. These steps reduce the attack surface and limit the potential for exploitation while awaiting vendor remediation.

Description

A flaw has been found in Tosei Self-service Washing Machine 4.02. Impacted is an unknown function of the file /cgi-bin/tosei_datasend.php. Executing a manipulation of the argument adr_txt_1 can lead to command injection. It is possible to launch the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

The primary impact of this vulnerability is unauthorized remote command execution on Tosei Self-service Washing Machines running version 4.02. This could lead to complete compromise of the device, allowing attackers to disrupt laundry services, manipulate machine settings, or cause denial of service. In environments where these machines are networked, attackers could use compromised devices as footholds to move laterally within the network, potentially targeting other critical infrastructure or sensitive data. Public laundromats and shared facilities relying on these machines could face operational downtime, reputational damage, and customer dissatisfaction. Although the direct confidentiality impact is low, the integrity and availability of the service are at risk. The exploitability without authentication and user interaction increases the threat level. The lack of vendor patching means the vulnerability will persist, increasing exposure over time. Organizations with large deployments or integration into broader IoT or facility management systems are particularly vulnerable to cascading effects.

Summary

CVE-2026-2533 is a command injection vulnerability identified in the Tosei Self-service Washing Machine firmware version 4.02. The vulnerability exists in the /cgi-bin/tosei_datasend.php script, where the input parameter adr_txt_1 is not properly sanitized, allowing an attacker to inject and execute arbitrary system commands remotely. This flaw does not require any authentication or user interaction, making it accessible to any remote attacker with network access to the device. The vulnerability stems from insecure coding practices in handling CGI parameters, which can be exploited to gain control over the device’s operating system. The vendor was notified but has not responded or provided a patch, and exploit code has been publicly released, increasing the likelihood of active exploitation. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and low impact on confidentiality, integrity, and availability, resulting in a medium severity rating of 6.9. The affected product is a self-service washing machine commonly deployed in laundromats and public facilities, which may be connected to local or wide area networks for remote management and monitoring. Successful exploitation could allow attackers to disrupt service, manipulate device operation, or pivot to other networked systems. The lack of vendor response and patch availability heightens the urgency for organizations to implement compensating controls.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Feb 2026, 21:17 UTC

Technical details

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