WAVLINK WN535M1/WN535M3 Unauthenticated Arbitrary File Write via sync_server
Published Sep 11, 2026
8.8
HIGHCVSS 4.0
EPSS 1.01%
Description
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.
Affected products
-
- Version M35M1_V210223StatusaffectedConstraints-
- Version M35M1_V250922StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WAVLINK Technology | n/a | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (3)
- https://docs.wavlink.xyz/ productpatch
- https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md exploittechnical-description
- https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-arbitrary-file-write-via-sync-server third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://docs.wavlink.xyz/ | productpatch | |
| https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md | exploittechnical-description | |
| https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-arbitrary-file-write-via-sync-server | third-party-advisory |
Change history (0)
No recorded changes yet.