How severe is CVE-2021-26726?

CVE-2021-26726 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26726 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26726?

CVE-2021-26726 affects Valmet Dna. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26726?

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-2021-26726 published?

CVE-2021-26726 was published on 2022-02-16 and last updated on 2026-06-17.

CVE-2021-26726

CVE-2021-26726 is a high-severity vulnerability in Valmet Dna with a CVSS 3.x base score of 8.8. 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-330.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 8.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Valmet Dna
Published: 2022-02-16
Last modified: 2026-06-17

Description

A remote code execution vulnerability affecting a Valmet DNA service listening on TCP port 1517, allows an attacker to execute commands with SYSTEM privileges This issue affects: Valmet DNA versions from Collection 2012 until Collection 2021.

Frequently asked questions

What is CVE-2021-26726?: A remote code execution vulnerability affecting a Valmet DNA service listening on TCP port 1517, allows an attacker to execute commands with SYSTEM privileges This issue affects: Valmet DNA versions from Collection 2012 until Collection 2021.
How severe is CVE-2021-26726?: CVE-2021-26726 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26726 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26726?: CVE-2021-26726 affects Valmet Dna. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26726?: 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-2021-26726 published?: CVE-2021-26726 was published on 2022-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:valmet:dna:*:*:*:*:*:*:*:*

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