How severe is CVE-2019-18321?

CVE-2019-18321 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-18321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18321?

CVE-2019-18321 affects Siemens Sppa-t3000 Ms3000 Migration Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18321?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-18321 published?

CVE-2019-18321 was published on 2019-12-12 and last updated on 2026-06-17.

CVE-2019-18321

CVE-2019-18321 is a critical-severity vulnerability in Siemens Sppa-t3000 Ms3000 Migration Server with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Siemens Sppa-t3000 Ms3000 Migration Server
Published: 2019-12-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in SPPA-T3000 MS3000 Migration Server (All versions). An attacker with network access to the MS3000 Server could be able to read and write arbitrary files on the local file system by sending specifically crafted packets to port 5010/tcp. This vulnerability is independent from CVE-2019-18322. Please note that an attacker needs to have network access to the MS3000 in order to exploit this vulnerability. At the time of advisory publication no public exploitation of this security vulnerability was known.

Frequently asked questions

What is CVE-2019-18321?: A vulnerability has been identified in SPPA-T3000 MS3000 Migration Server (All versions). An attacker with network access to the MS3000 Server could be able to read and write arbitrary files on the local file system by sending specifically crafted packets to port 5010/tcp. This vulnerability is independent from CVE-2019-18322. Please note that an attacker needs to have network access to the MS3000 in order to exploit this vulnerability. At the time of advisory publication no public exploitation of this security vulnerability was known.
How severe is CVE-2019-18321?: CVE-2019-18321 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-18321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18321?: CVE-2019-18321 affects Siemens Sppa-t3000 Ms3000 Migration Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-18321 published?: CVE-2019-18321 was published on 2019-12-12 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-451445.pdf

Affected products (1)

cpe:2.3:a:siemens:sppa-t3000_ms3000_migration_server:*:*:*:*:*:*:*:*

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