CVE-2021-40336
highpriority · track · 35EPSS 0.005 · 42 %ileEURUUSEPSS · scored 2026-10-26
A vulnerability exists in the http web interface where the web interface does not validate data in an HTTP header. This causes a possible HTTP response splitting, which if exploited could lead an attacker to channel down harmful code into the user’s web browser, such as to steal the session cookies. Thus, an attacker who successfully makes an MSM user who has already established a session to MSM web interface clicks a forged link to the MSM web interface, e.g., the link is sent per E-Mail, could trick the user into downloading malicious software onto his computer. This issue affects: Hitachi Energy MSM V2.2 and prior versions.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMSMcisa_csaf_ot
Links used for access to an MSM system should not be sent by email. Links to MSM should not be opened. Suspicious emails should be reported to the IT administrator.
- MitigationMSMcisa_csaf_ot
Ensure process control systems have no direct connections to the internet.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–8.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (5)
Products and version ranges known to be affected.
- hitachienergy modular switchgear monitoring firmware≤ 2.2.0nvdUScpe:2.3:o:hitachienergy:modular_switchgear_monitoring_firmware:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-22-277-02Hitachi Energy Modular Switchgear Monitoring (MSM)2022-10-04icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to perform malicious command injection, trick a valid user into downloading malicious software onto their computer. Successful exploitation may also allow an attacker to pose as a legitimate user.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2021-40336/cnnvd
- https://search.abb.com/library/Download.aspx?DocumentID=8DBD000085&LanguageCode=en&DocumentPartId=&Action=Launchcnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-22-277-02cnnvd
- https://www.hitachienergy.com/offering/product-and-system/high-voltage-switchgear-and-breakers/monitoring-and-controlled-switching/modular-switchgear-monitoring-msmPatchcnnvd
- https://search.abb.com/library/Download.aspx?DocumentID=8DBD000085&LanguageCode=en&DocumentPartId=&Action=Launchenisa_euvd
- https://search.abb.com/library/Download.aspx?DocumentID=8DBD000085&LanguageCode=en&DocumentPartId=&Action=LaunchVendor Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan