PatchSiren cyber security CVE debrief

CVE-2026-5686 Tenda CVE debrief

CVE-2026-5686 is a stack-based buffer overflow vulnerability in Tenda CX12L 16.03.53.12. The vulnerability affects the fromRouteStatic function in /goform/RouteStatic. The manipulation of the argument page results in a stack-based buffer overflow. The attack can be launched remotely. This vulnerability has a high CVSS score of 7.4, indicating a high severity level. Network administrators and security teams responsible for Tenda CX12L devices should prioritize patching this vulnerability to prevent potential remote attacks. The CVE record was published on 2026-04-06T22:16:24.880Z and was last modified on 2026-07-24T09:10:00.153Z.

Vendor: Tenda
Product: CX12L
CVSS: HIGH 7.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-04-06
Original CVE updated: 2026-07-24
Advisory published: 2026-04-06
Advisory updated: 2026-07-24

Who should care

Network administrators and security teams responsible for Tenda CX12L devices should prioritize patching this vulnerability to prevent potential remote attacks. The vulnerability affects Tenda CX12L 16.03.53.12, specifically the fromRouteStatic function in /goform/RouteStatic. The manipulation of the argument page results in a stack-based buffer overflow. The attack can be launched remotely. The CVSS score for this vulnerability is 7.4, indicating a high severity level.

Technical summary

The CVE-2026-5686 vulnerability is caused by a stack-based buffer overflow in the fromRouteStatic function of the /goform/RouteStatic file in Tenda CX12L 16.03.53.12. An attacker can exploit this vulnerability remotely by manipulating the argument page. The CVSS score for this vulnerability is 7.4, indicating a high severity level. Network administrators and security teams should prioritize patching this vulnerability to prevent potential remote attacks. The vulnerability affects Tenda CX12L devices, specifically the fromRouteStatic function in /goform/RouteStatic.

Defensive priority

High priority should be given to patching this vulnerability, as it can be exploited remotely and has a high CVSS score.

Recommended defensive actions

Apply the vendor-provided patch for Tenda CX12L 16.03.53.12
Limit access to the /goform/RouteStatic endpoint
Monitor network traffic for suspicious activity
Perform regular vulnerability scans and updates
Review compensating controls for exposed systems while remediation is scheduled and verified
Check relevant monitoring, detection, and logs for exposed assets that need extra review
Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-04-06T22:16:24.880Z and was last modified on 2026-07-24T09:10:00.153Z. The NVD entry is currently Analyzed. The vulnerability affects Tenda CX12L 16.03.53.12, specifically the fromRouteStatic function in /goform/RouteStatic. The manipulation of the argument page results in a stack-based buffer overflow. The attack can be launched remotely. The CVSS score for this vulnerability is 7.4, indicating a high severity level. Network administrators and security teams should prioritize patching this vulnerability to prevent potential remote attacks.

Sources and references

Verified primary and authoritative sources

CVE-2026-5686 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-5686

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-5686 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5686

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/cve-a/lvdan/issues/4

[email protected] - Exploit, Issue Tracking, Mitigation, Third Party Advisory
Mitigation or vendor reference
Unverified legacy reference

URL: https://vuldb.com/submit/792783

[email protected] - Third Party Advisory, VDB Entry
Mitigation or vendor reference
Unverified legacy reference

URL: https://vuldb.com/vuln/355513

[email protected] - Third Party Advisory, VDB Entry
Source reference
Unverified legacy reference

URL: https://vuldb.com/vuln/355513/cti

[email protected] - Permissions Required, VDB Entry
Source reference
Unverified legacy reference

URL: https://www.tenda.com.cn/

[email protected] - Product

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.