CVE-2026-89009 (GCVE-0-2026-89009)
Vulnerability from cvelistv5
Published
2026-09-11 14:56
Modified
2026-10-29 17:47
Severity ?
8.8 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-36 - Absolute Path Traversal
Summary
WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated arbitrary file write vulnerability that allows remote attackers to overwrite any file on the device by sending a crafted payload to the sync_server daemon on TCP port 13136. The daemon, which runs as root and requires no authentication, accepts a 100-byte filename field in its protocol header without path canonicalization, allowing attackers to supply an absolute path and write arbitrary content to overwrite startup scripts or credential stores to achieve persistent system compromise.
References
Impacted products
Vendor Product Version
WAVLINK Technology WN535M1 Version: M35M1_V210223   <
Patch: M35M1_V250922
 Create a notification for this product.
   WAVLINK Technology WN535M3 Version: M35M1_V210223   <
Patch: M35M1_V250922
 Create a notification for this product.
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