How severe is CVE-2020-13559?

CVE-2020-13559 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-13559 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13559?

CVE-2020-13559 affects Freyrscada Iec-60879-5-104 Server Simulator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13559?

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

When was CVE-2020-13559 published?

CVE-2020-13559 was published on 2021-01-11 and last updated on 2026-06-17.

CVE-2020-13559

CVE-2020-13559 is a high-severity vulnerability in Freyrscada Iec-60879-5-104 Server Simulator with a CVSS 3.x base score of 7.5. 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-697.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-697
Affected product: Freyrscada Iec-60879-5-104 Server Simulator
Published: 2021-01-11
Last modified: 2026-06-17

Description

A denial-of-service vulnerability exists in the traffic-logging functionality of FreyrSCADA IEC-60879-5-104 Server Simulator 21.04.028. A specially crafted packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.

Frequently asked questions

What is CVE-2020-13559?: A denial-of-service vulnerability exists in the traffic-logging functionality of FreyrSCADA IEC-60879-5-104 Server Simulator 21.04.028. A specially crafted packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.
How severe is CVE-2020-13559?: CVE-2020-13559 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-13559 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13559?: CVE-2020-13559 affects Freyrscada Iec-60879-5-104 Server Simulator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13559?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-13559 published?: CVE-2020-13559 was published on 2021-01-11 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1174

Affected products (1)

cpe:2.3:a:freyrscada:iec-60879-5-104_server_simulator:21.04.028:*:*:*:*:*:*:*

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