A vulnerability has been identified in Siemens License Server (SLS) (All versions < V4.3).

published 2025-04-08 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-10323

cvss: 6.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits: 0; none known

A vulnerability has been identified in Siemens License Server (SLS) (All versions < V4.3). The affected application does not properly restrict permissions of the users. This could allow a lowly-privileged attacker to escalate their privileges.

Patch / fix

fixed in 1

Siemens Siemens License Server (SLS) V4.3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-100-01 updated 2025-05-06 cvss 6.7

Siemens License Server (SLS)

Siemens License Server (SLS) <V4.3
affected: fixed in V4.3

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 19 mo ago (2025-04-08)

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CNA	4.0	5.4	CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	5.4	CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/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

Affected products

Siemens Siemens License Server (SLS)

Classification

Weakness

CWE-295 Improper Certificate Validation

References

cert-portal.siemens.com /productcert/html/ssa-525431.html

Sources

CVE List CVE-2025-30000
NVD CVE-2025-30000

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary