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Tenda AC9 CVE-2025-5836

| EUVDEUVD-2025-17376 LOW
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)
2025-06-07 cna@vuldb.com
2.1
CVSS 4.0 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate to router web interface
  2. Delivery
    Send crafted POST to /goform/SetIPTVCfg
  3. Exploit
    Inject commands via 'list' parameter
  4. Execution
    Execute arbitrary OS commands
  5. Impact
    Compromise router integrity

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Input neutralization, injection prevention
Exploitation Conditions

Requires low-privileged authentication to the router's web interface (PR:L). The attacker must be able to send POST requests to the /goform/SetIPTVCfg endpoint. No special configuration is needed beyond default settings. The attack is remote over the network (AV:N).

Impact

CVSS 4.0 base score is 2.1 (Low) with vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L, indicating low impact on confidentiality, integrity, and availability. However, the EPSS score of 2.05% (84th percentile) suggests moderate exploitation probability. A public exploit exists, increasing risk. The attack requires low privileges (PR:L), meaning an attacker needs a valid account on the router. No CISA KEV listing indicates no confirmed active exploitation. Overall, risk is moderate for environments where attackers can obtain low-privileged access to the router's web interface.

Exploit ScenarioDerived

An attacker with low-privileged access to the router's web interface sends a crafted POST request to /goform/SetIPTVCfg with a malicious 'list' parameter containing command injection payloads. This results in arbitrary command execution on the router, potentially allowing further network compromise. A public exploit is available, simplifying the attack.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 2.1% exploitation probability (EPSS)

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AnalysisAIv2 – Jul 26, 2026

Command injection in Tenda AC9 router firmware 15.03.02.13 allows remote authenticated attackers to execute arbitrary commands via the 'list' parameter in the formSetIptv handler. A public exploit is available, and EPSS score (2.05%, 84th percentile) indicates moderate exploitation likelihood, though no active exploitation in CISA KEV is reported.

Earlier versions of this analysis (1)
v1 Mar 14, 2026 - 19:13 CVSS 6.3

RemediationAI

Upgrade to a patched firmware version if available; Tenda has not released a fix as of analysis. As a workaround, restrict access to the router's web interface to trusted networks only, disable remote management, and change default credentials. Monitor for vendor updates at https://www.tenda.com.cn/. Note that disabling IPTV functionality may mitigate the attack vector but could affect service.

Affected VersionsENISA

AC9 15.03.02.13

Affected Packages

euvd ac9 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability resides in the POST request handler for /goform/SetIPTVCfg, which processes IPTV configuration. The 'list' argument is not sanitized before being used in a system command, leading to OS command injection (CWE-74). The affected product is Tenda AC9 router firmware version 15.03.02.13, a consumer-grade wireless router. The CPE string cpe:2.3:o:tenda:ac9_firmware:15.03.2.13 confirms the exact firmware version.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 2.1 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
vuln.today AI 6.3 MEDIUM

PR:L due to required authentication; low impact on CIA

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
Low
Vulnerable system: Availability
Low
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

5
Severity Changed
Apr 29, 2026 - 01:11 NVD
MEDIUM LOW
CVSS changed
Apr 29, 2026 - 01:11 NVD
6.3 (MEDIUM) 2.1 (LOW)
PoC Detected
Jun 09, 2025 - 19:07 vuln.today
Public exploit code
CVE Published
Jun 07, 2025 - 14:15 nvd
MEDIUM 6.3
CVE Published
Jun 07, 2025 - 14:15 cve.org
LOW 2.1

DescriptionCVE.org

A vulnerability was found in Tenda AC9 15.03.02.13. It has been rated as critical. This issue affects the function formSetIptv of the file /goform/SetIPTVCfg of the component POST Request Handler. The manipulation of the argument list leads to command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Executive ViewAI

Why It Matters

Organizations using A vulnerability should be aware of moderate risk from CVE-2025-5836, a injection vulnerability rated CVSS 6.3. Exploitation could allow attackers to execute code or inject malicious input. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: deploy WAF rules, restrict network access, enable logging.

Threat Intelligence Overview

EPSS Score
2.1%
Top 16% exploitable
Prevalence
Medium
Tenda AC9 is a consumer router, moderately deployed
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC Yes
EPSS 2.1%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +2
CVSS: +10
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

CVE-2025-45042 CRITICAL POC
9.8 May 05

Tenda AC9 v15.03.05.14 was discovered to contain a command injection vulnerability via the Telnet function. Rated critic

CVE-2025-29384 CRITICAL POC
9.8 Mar 14

In Tenda AC9 v1.0 V15.03.05.14_multi, the wanMTU parameter of /goform/AdvSetMacMtuWan has a stack overflow vulnerability

CVE-2025-44877 CRITICAL POC
9.8 May 02

Tenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formSetSambaConf function via

CVE-2025-44872 CRITICAL POC
9.8 May 02

Tenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formsetUsbUnload function via

CVE-2025-45429 CRITICAL POC
9.8 Apr 23

In the Tenda ac9 v1.0 router with firmware V15.03.05.14_multi, there is a stack overflow vulnerability in /goform/WifiWp

CVE-2025-45428 CRITICAL POC
9.8 Apr 23

In Tenda ac9 v1.0 with firmware V15.03.05.14_multi, the rebootTime parameter of /goform/SetSysAutoRebbotCfg has a stack

CVE-2025-45427 CRITICAL POC
9.8 Apr 23

In Tenda AC9 v1.0 with firmware V15.03.05.14_multi, the security parameter of /goform/WifiBasicSet has a stack overflow

CVE-2025-29386 CRITICAL POC
9.8 Mar 14

In Tenda AC9 v1.0 V15.03.05.14_multi, the mac parameter of /goform/AdvSetMacMtuWan has a stack overflow vulnerability, w

CVE-2025-29385 CRITICAL POC
9.8 Mar 14

In Tenda AC9 v1.0 V15.03.05.14_multi, the cloneType parameter of /goform/AdvSetMacMtuWan has a stack overflow vulnerabil

CVE-2024-42634 CRITICAL POC
9.8 Aug 16

A Command Injection vulnerability exists in formWriteFacMac of the httpd binary in Tenda AC9 v15.03.06.42. Rated critica

CVE-2024-24543 CRITICAL POC
9.8 Feb 05

Buffer Overflow vulnerability in the function setSchedWifi in Tenda AC9 v.3.0, firmware version v.15.03.06.42_multi allo

CVE-2023-40942 CRITICAL POC
9.8 Sep 07

Tenda AC9 V3.0BR_V15.03.06.42_multi_TD01 was discovered stack overflow via parameter 'firewall_value' at url /goform/Set

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