Vulnerability details
CVE-2026-89010
WAVLINK Technology WN535M1WAVLINK Technology WN535M3
WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server
CVSS 4.0
9.3Critical
Official description
WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated OS command injection vulnerability that allows remote attackers to execute arbitrary commands as root by sending crafted filenames to the sync_server daemon on TCP port 13136. The daemon interpolates attacker-controlled filename input containing shell metacharacters into a shell command string via sprintf() and passes it to system() without sanitization, enabling root-level command execution on the device.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| WAVLINK Technology | WN535M1 | M35M1_V210223 | CVEProject cvelistV5 (CNA) |
| WAVLINK Technology | WN535M3 | M35M1_V210223 | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md technical-descriptionexploit
- https://docs.wavlink.xyz/Security_Advisory/WAVLINK-SA-2026-091302/ patchvendor-advisory
- https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-server third-party-advisory
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Details
- Published
- 2026-09-11
- Last updated
- 2026-10-29
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
3.16%
Probability of exploitation in 30 days
88%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')