What is the CVSS score of CVE-2021-37439?

CVE-2021-37439 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 1.2%.

Is there a public PoC exploit available for CVE-2021-37439?

Yes, a public proof-of-concept exploit is available for CVE-2021-37439. Prioritise patching immediately. EPSS: 1.2%.

Flexiserver CVE-2021-37439

MEDIUM

Path Traversal (CWE-22)

2021-07-25 cve@mitre.org

Path Traversal Flexiserver

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Jul 25, 2021 - 22:15 nvd

MEDIUM 6.5

DescriptionNVD

NCH FlexiServer v6.00 suffers from a syslog?file=/.. path traversal vulnerability.

AnalysisAI

NCH FlexiServer v6.00 suffers from a syslog?file=/.. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. NCH FlexiServer v6.00 suffers from a syslog?file=/.. path traversal vulnerability. Affected products include: Nch Flexiserver.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.