How severe is CVE-2025-63909?

CVE-2025-63909 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-63909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63909?

CVE-2025-63909 affects Cohesity Tranzman. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63909?

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.

Does CVE-2025-63909 have an EU (EUVD) identifier?

Yes. CVE-2025-63909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208241.

When was CVE-2025-63909 published?

CVE-2025-63909 was published on 2026-03-03 and last updated on 2026-06-17.

CVE-2025-63909

CVE-2025-63909 is a high-severity vulnerability in Cohesity Tranzman with a CVSS 3.x base score of 7.2. 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-269.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208241
Weakness: CWE-269
Affected product: Cohesity Tranzman
Published: 2026-03-03
Last modified: 2026-06-17

Description

Incorrect access control in the component /opt/SRLtzm/bin/TapeDumper of Cohesity TranZman Migration Appliance Release 4.0 Build 14614 allows attackers to escalate privileges to root and read and write arbitrary files.

Frequently asked questions

What is CVE-2025-63909?: Incorrect access control in the component /opt/SRLtzm/bin/TapeDumper of Cohesity TranZman Migration Appliance Release 4.0 Build 14614 allows attackers to escalate privileges to root and read and write arbitrary files.
How severe is CVE-2025-63909?: CVE-2025-63909 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-63909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63909?: CVE-2025-63909 affects Cohesity Tranzman. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63909?: 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.
Does CVE-2025-63909 have an EU (EUVD) identifier?: Yes. CVE-2025-63909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208241.
When was CVE-2025-63909 published?: CVE-2025-63909 was published on 2026-03-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cohesity:tranzman:4.0:build14614:*:*:*:*:*:*

More vulnerabilities in Cohesity Tranzman

CVE-2025-63912 — High (CVSS 7.5): Cohesity TranZman Migration Appliance Release 4.0 Build 14614 was discovered to use a weak cryptography algorithm for…
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