CVE-2025-63909: Incorrect access control in the component /opt/SRLtzm/bin/TapeDumper of Cohesity TranZman Migration Appliance

Routine

HIGH 7.2DOWNGRADE

CVE-2025-63909 is a high-severity flaw (CVSS 7.2) affecting tranzman. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-269
Published	2026-03-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cohesity

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-03 18:16 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

cohesity tranzman DOWNGRADE

Affected: 4.0 build14614

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy tranzman || rpm -q tranzman || tranzman --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison tranzman sudo apt install tranzman=<VERSION_BEFORE_4.0> sudo apt-mark hold tranzman

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tranzman sudo dnf downgrade tranzman-<VERSION_BEFORE_4.0> sudo dnf versionlock add tranzman

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-63909?

tranzman: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-63909 being exploited?

CVE-2025-63909 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-63909 affect?

CVE-2025-63909 affects tranzman. Severity is high (CVSS 7.2). 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 urgent is CVE-2025-63909?

Priority 37/100. High severity; Public exploit reference

Related CVEs

CVE-2025-67840 HIGH 7.2 DOWNGRADE Multiple authenticated OS command injection vulnerabilities exist in the Cohesity (formerly Stone Ram) TranZma
CVE-2025-63912 HIGH 7.5 DOWNGRADE Cohesity TranZman Migration Appliance Release 4.0 Build 14614 was discovered to use a weak cryptography algori
CVE-2025-63911 HIGH 7.2 DOWNGRADE Cohesity TranZman Migration Appliance Release 4.0 Build 14614 was discovered to contain an authenticated comma
CVE-2025-63910 HIGH 7.2 DOWNGRADE An authenticated arbitrary file upload vulnerability in Cohesity TranZman Migration Appliance Release 4.0 Buil

References

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