How severe is CVE-2020-5561?

CVE-2020-5561 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2020-5561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5561?

CVE-2020-5561 affects Keijiban Tsumiki Project Keijiban Tsumiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5561?

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-2020-5561 published?

CVE-2020-5561 was published on 2020-03-25 and last updated on 2026-06-17.

CVE-2020-5561

CVE-2020-5561 is a critical-severity vulnerability in Keijiban Tsumiki Project Keijiban Tsumiki with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Keijiban Tsumiki Project Keijiban Tsumiki
Published: 2020-03-25
Last modified: 2026-06-17

Description

Keijiban Tsumiki v1.15 allows remote attackers to execute arbitrary OS commands via unspecified vectors.

Frequently asked questions

What is CVE-2020-5561?: Keijiban Tsumiki v1.15 allows remote attackers to execute arbitrary OS commands via unspecified vectors.
How severe is CVE-2020-5561?: CVE-2020-5561 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2020-5561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5561?: CVE-2020-5561 affects Keijiban Tsumiki Project Keijiban Tsumiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5561?: 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-2020-5561 published?: CVE-2020-5561 was published on 2020-03-25 and last updated on 2026-06-17.

References

https://jvn.jp/en/jp/JVN88277644/index.html

Affected products (1)

cpe:2.3:a:keijiban_tsumiki_project:keijiban_tsumiki:1.15:*:*:*:*:*:*:*

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