CVE-2025-2449: NI FlexLogger usiReg URI File Parsing Directory Traversal Remote Code Execution Vulnerability

This week

HIGH 8.8DOWNGRADE

CVE-2025-2449 is a high-severity flaw (CVSS 8.8) affecting flexlogger. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NI FlexLogger usiReg URI File Parsing Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to create arbitrary files on affected installations of NI FlexLogger. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of URI files by the usiReg component. The issue results from the

Why this priority

High severity
EPSS top 2%: very likely to be exploited

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	33.7% (top 2%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-03-18
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: ni

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

Am I affected?

Timeline

2025-03-18 14:15 UTCPublished CVE record published
2026-06-17 09:07 UTCUpdated Record last modified

ni flexlogger DOWNGRADE

Affected: 2024 q1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2024

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2024 (Debian / Ubuntu)

apt-cache madison flexlogger sudo apt install flexlogger=<VERSION_BEFORE_2024> sudo apt-mark hold flexlogger

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

dnf --showduplicates list flexlogger sudo dnf downgrade flexlogger-<VERSION_BEFORE_2024> sudo dnf versionlock add flexlogger

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-2025-2449?

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

Is CVE-2025-2449 being exploited?

CVE-2025-2449 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-2025-2449 affect?

CVE-2025-2449 affects flexlogger. Severity is high (CVSS 8.8). NI FlexLogger usiReg URI File Parsing Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to create arbitrary files on affected installations of NI FlexLogger. User interaction is required to

How urgent is CVE-2025-2449?

Priority 55/100. High severity; EPSS top 2%: very likely to be exploited

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References

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