Unauthenticated router crash via unbounded timeZone copy
Published Jan 16, 2026 · Updated Jan 16, 2026
Stack-based buffer overflow in Tenda AX-1806 1.0.0.1 allows remote attackers to crash the router through a crafted timeZone value. In fromSetSysTime, a colon-free timeZone value is copied with unbounded strcpy into a fixed-size stack buffer, corrupting adjacent memory. No authentication or user interaction is required; exploitation crashes the target router and persistently interrupts its network services.
Summary
What happened
Stack-based buffer overflow in Tenda AX-1806 1.0.0.1 allows remote attackers to crash the router through a crafted timeZone value. In fromSetSysTime, a colon-free timeZone value is copied with unbounded strcpy into a fixed-size stack buffer, corrupting adjacent memory. No authentication or user interaction is required; exploitation crashes the target router and persistently interrupts its network services.
The record
- CVE
- CVE-2025-70746
- Published
- Jan 16, 2026
- Updated
- Jan 16, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 16, 2026CVE publishedPublication date reported by the CVE source.
- Jan 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
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
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
- Tenda AX-1806 SetSysTimeCfg denial-of-service proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo