Remote code execution via unsanitized MAC parameter
Published Sep 13, 2026 · Updated Sep 13, 2026
Command injection in LB-LINK AC1900_AZ2 1.0.2 allows remote attackers to execute operating system commands via a crafted HTTP POST. The bs_SetLimitCli_info function inserts the unvalidated mac parameter into an iptables command passed to bl_do_system by the set_LimitClient_cfg handler. Exploitation requires network access to that endpoint but not administrative access, and injected commands run in the router's operating system context.
Summary
What happened
Command injection in LB-LINK AC1900_AZ2 1.0.2 allows remote attackers to execute operating system commands via a crafted HTTP POST. The bs_SetLimitCli_info function inserts the unvalidated mac parameter into an iptables command passed to bl_do_system by the set_LimitClient_cfg handler. Exploitation requires network access to that endpoint but not administrative access, and injected commands run in the router's operating system context.
The record
- CVE
- CVE-2026-35867
- Published
- Sep 13, 2026
- Updated
- Sep 13, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1059.004
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 13, 2026CVE publishedPublication date reported by the CVE source.
- Sep 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- AC1900_AZ2 bs_SetLimitCli_info HTTP proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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