VulnerabilityAnalyzed
CVE-2026-4861
A weakness has been identified in Wavlink WL-NU516U1 260227.
HIGH 7.4EPSS 0.85%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.85%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
- CVSS 4.0
- 7.4 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.85% probability · 56th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-121
- Affected
- wavlink/wl-nu516u1 firmware
- Source
- cna@vuldb.com
References
- https://github.com/Wlz1112/WAVLINK-NU516U1-V260227/blob/main/Content-Length.mdExploit, Third Party Advisory
- https://vuldb.com/?ctiid.353192Permissions Required, VDB Entry
- https://vuldb.com/?id.353192Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.776217Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.