Cyber Resilience

CVE-2026-2402

Schneider-Electric Powerchute Serial Shutdown ≤ 1.5

Published
14 April 2026
Modified
22 April 2026
Patch / advisory
View advisory
CVSS Score v4 6.9
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0027 20th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-2402 is a medium-severity Improper Restriction of Excessive Authentication Attempts (CWE-307) vulnerability in Schneider-Electric Powerchute Serial Shutdown. Its CVSS base score is 6.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Brute Force (T1110); ranked at the 20th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-7 (Unsuccessful Logon Attempts) and AC-2 (Account Management) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists that would allow an attacker to gain access to the user account by performing an arbitrary number of authentication attempts with different credentials on a sequence of requests to multiple endpoints.

CWE(s)
CWE-307

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1110 Brute Force Credential Access
Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.
attack.mitre.org →
T1110.001 Password Guessing Credential Access
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
attack.mitre.org →
T1110.004 Credential Stuffing Credential Access
Adversaries may use credentials obtained from breach dumps of unrelated accounts to gain access to target accounts through credential overlap.
attack.mitre.org →
Why these techniques?

CWE-307 directly enables brute force attacks via unlimited authentication attempts (T1110), specifically password guessing (T1110.001) and credential stuffing (T1110.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-2399Same product: Schneider-Electric Powerchute Serial Shutdown
CVE-2026-2404Same product: Schneider-Electric Powerchute Serial Shutdown
CVE-2026-2403Same product: Schneider-Electric Powerchute Serial Shutdown
CVE-2026-2405Same product: Schneider-Electric Powerchute Serial Shutdown
CVE-2026-2400Same product: Schneider-Electric Powerchute Serial Shutdown
CVE-2026-2401Same product: Schneider-Electric Powerchute Serial Shutdown
CVE-2025-64526Shared CWE-307
CVE-2026-40586Shared CWE-307
CVE-2025-6015Shared CWE-307
CVE-2026-3329Shared CWE-307

Affected Assets

schneider-electric
powerchute serial shutdown
≤ 1.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-7 Unsuccessful Logon Attempts
  • AC-2 Account Management
Detect
Catch it (NIST detect / respond)
  • SI-4 System Monitoring
Harden
Shrink the surface (DISA STIG)
  • 2 hardening rules · 1 OS baseline
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

AC-7 Unsuccessful Logon Attempts good match
prevent

Directly enforces limits on consecutive unsuccessful authentication attempts, blocking the brute-force described in CWE-307.

AC-2 Account Management partial match
prevent

Account management policies can define lockout thresholds and credential validation rules that stop unlimited attempts across endpoints.

SI-4 System Monitoring partial match
detect

Monitors authentication traffic for anomalous volumes of failed attempts, enabling detection even when spread across multiple endpoints.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 mostly match
prevents

Authentication enforcement directly includes lockout, throttling, and MFA policies that prevent brute-force attempts.

DE.CM-03 partial match
prevents

Behavioral monitoring of authentication activity can detect excessive failed attempts after they occur.

PR.PS-04 partial match
prevents

Generating auth logs enables later detection or forensics but does not itself restrict attempts.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.5 Secure authentication partial match
prevents

CAPTCHA, account lock-out after repeated failures, and alerts on excessive attempts directly stop automated brute-force guessing of credentials.

References