CVE-2026-25656: A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (A

Q: How do I fix CVE-2026-25656?

sinec nms: mitigate or apply the listed mitigation; user management component: upgrade to 2.15.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-25656 being exploited?

CVE-2026-25656 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-25656 affect?

CVE-2026-25656 affects sinec nms, user management component. Severity is high (CVSS 7.8). A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1). The affected application permits improper modification of a configuration file by a low-privileged user.

Routine

HIGH 7.8MITIGATEUPGRADE

CVE-2026-25656 is a high-severity flaw (CVSS 7.8) affecting sinec nms, user management component. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1). The affected application permits improper modification of a configuration file by a low-privileged user. This could allow an attacker to load malicious DLLs, potentially leading to arbitrary code execution with SYSTEM privileges.(ZDI-CAN-28108)

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-427
Published	2026-02-10
Last modified	2026-06-17

Publisher (CNA): Siemens AG · Vendor: siemens

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-10 10:15 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

siemens sinec nms MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sinec-nms || rpm -q sinec-nms || sinec-nms --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

siemens user management component UPGRADE

Affected: < 2.15.2.1

Fixed in: 2.15.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy user-management-component || rpm -q user-management-component || user-management-component --version

2. UPGRADE to 2.15.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade user-management-component

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade user-management-component

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25656?

sinec nms: mitigate or apply the listed mitigation; user management component: upgrade to 2.15.2.1. Exact commands for each OS are on this page.

Is CVE-2026-25656 being exploited?

CVE-2026-25656 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25656 affect?

CVE-2026-25656 affects sinec nms, user management component. Severity is high (CVSS 7.8). A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1). The affected application permits improper modification of a configuration file by a low-privileged user.

How urgent is CVE-2026-25656?

Priority 32/100. High severity

Software pages

Siemens vulnerabilities

Related CVEs

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References

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