CVE-2021-40336

HTTP Response Splitting in Hitachi Energy’s MSM Product

HIGH
8.8
CVSS Score
Published: July 25, 2022 at 02:34 PM UTC
Updated: June 17, 2026 at 04:06 AM UTC
2 products affected across 1 vendorModular Switchgear Monitoring FirmwareModular Switchgear Monitoring

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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 2.2.02.2
hitachienergy-modular-switchgear-monitoring (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-113CWE-74

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