CVE-2025-62581Network attack vector

Authentication bypass via hard-coded JWT secret

Published Jan 16, 2026 · Updated Jan 16, 2026

Authentication bypass in Delta Electronics DIAView 4.3.1 and earlier allows remote attackers to perform protected WebHMI operations. DIAView WebHMI signs JWTs with a hard-coded secret, allowing a specially crafted message carrying a forged token to pass authentication. No credentials or user interaction are required; acceptance of the forged token exposes operations reserved for authenticated WebHMI sessions.

CVSS severity9.8
Critical
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Delta Electronics DIAView 4.3.1 and earlier allows remote attackers to perform protected WebHMI operations. DIAView WebHMI signs JWTs with a hard-coded secret, allowing a specially crafted message carrying a forged token to pass authentication. No credentials or user interaction are required; acceptance of the forged token exposes operations reserved for authenticated WebHMI sessions.

The record

CVE
CVE-2025-62581
Published
Jan 16, 2026
Updated
Jan 16, 2026
Vendor
Delta Electronics, Inc.
Product
DIAView SCADA System
Classifications
CWE-321, CAPEC-196, T1550.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Delta Electronics, Inc. · DIAView SCADA Systemversion=0 <=4.3.1

Published CVSS scores

9.8Delta ElectronicsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
CAPEC-196Session Credential Falsification through Forging
T1550.001Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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