CVE-2026-25655: A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP2)

Q: How do I fix CVE-2026-25655?

sinec nms: upgrade to 4.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-25655 being exploited?

CVE-2026-25655 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-2026-25655 affect?

CVE-2026-25655 affects sinec nms. Severity is high (CVSS 7.8). A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP2). The affected application permits improper modification of a configuration file by a low-privileged user. This could allow an attacker to load malicious DLLs, poten

Routine

HIGH 7.8UPGRADE

CVE-2026-25655 is a high-severity flaw (CVSS 7.8) affecting sinec nms. 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 SP2). 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 administrative privilege.(ZDI-CAN-28107)

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 UPGRADE

Affected: < 4.0 · 4.0 · 4.0 sp1

Fixed in: 4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sinec-nms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sinec-nms

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-2026-25655?

sinec nms: upgrade to 4.0. Exact commands for each OS are on this page.

Is CVE-2026-25655 being exploited?

CVE-2026-25655 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-2026-25655 affect?

CVE-2026-25655 affects sinec nms. Severity is high (CVSS 7.8). A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP2). The affected application permits improper modification of a configuration file by a low-privileged user. This could allow an attacker to load malicious DLLs, poten

How urgent is CVE-2026-25655?

Priority 32/100. High severity

Software pages

Siemens vulnerabilities

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References

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