What is the CVSS score of CVE-2025-57639?

CVE-2025-57639 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 4.2%.

Which versions of Ac9 Firmware are affected by CVE-2025-57639?

Organizations using OS Command injection vulnerability in Tenda AC9 1.0 should be aware of notable risk from CVE-2025-57639, a OS command injection vulnerability rated CVSS 6.5.

Is there a public PoC exploit available for CVE-2025-57639?

Yes, a public proof-of-concept exploit is available for CVE-2025-57639. Prioritise patching immediately. EPSS: 4.2%.

How to fix or mitigate CVE-2025-57639?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

Ac9 Firmware CVE-2025-57639

MEDIUM

OS Command Injection (CWE-78)

2025-09-23 cve@mitre.org

Command Injection Tenda Ac9 Firmware

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:13 vuln.today

PoC Detected

Sep 25, 2025 - 16:09 vuln.today

Public exploit code

CVE Published

Sep 23, 2025 - 18:15 nvd

MEDIUM 6.5

DescriptionCVE.org

AnalysisAI

OS Command injection vulnerability in Tenda AC9 1.0 was discovered to contain a command injection vulnerability via the usb.samba.guest.user parameter in the formSetSambaConf function of the httpd. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. OS Command injection vulnerability in Tenda AC9 1.0 was discovered to contain a command injection vulnerability via the usb.samba.guest.user parameter in the formSetSambaConf function of the httpd file. Affected products include: Tenda Ac9 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.