CVE-2026-25654Network attack vector

Authenticated arbitrary-user password reset via authorization bypass

Published Apr 14, 2026 · Updated Apr 14, 2026

Authorization bypass in Siemens SINEC NMS before V4.0 SP3 allows remote authenticated users to reset any user's password. The HTTPS web service fails to verify that a logged-in requester is authorized to target the account named in a password-reset request. Any authenticated account can therefore change another account's password and obtain that account's access, while no unauthenticated path is reported.

CVSS severity8.7
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Siemens SINEC NMS before V4.0 SP3 allows remote authenticated users to reset any user's password. The HTTPS web service fails to verify that a logged-in requester is authorized to target the account named in a password-reset request. Any authenticated account can therefore change another account's password and obtain that account's access, while no unauthenticated path is reported.

The record

CVE
CVE-2026-25654
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
Siemens
Product
SINEC NMS
Classifications
CWE-639, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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 <V4.0 SP3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · SINEC NMSversion=0 <V4.0 SP3

Published CVSS scores

8.8Siemens AGCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7Siemens AGCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1098Account Manipulation

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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