EUVD-2026-80042
GHSA-6pww-6jhw-38g6
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (vulncheck) · only source for this CVE.
CVSS VectorVendor: vulncheck
Lifecycle Timeline
2DescriptionCVE.org
Netcore NR255-V version 1.5.130703 contains an out-of-bounds read vulnerability in the mtd_write pre-flash validation routine triggered by short firmware uploads. Attackers can upload a truncated firmware image via put_file_cgi.c to trigger out-of-bounds reads across main.c, check_image_uuid.c, and oemMD5Update.c.
AnalysisAI
Out-of-bounds read in the Netcore NR255-V router (firmware 1.5.130703) is triggered when an authenticated user uploads a deliberately truncated firmware image through the put_file_cgi.c endpoint. The short buffer is passed into the pre-flash validation path (mtd_write, main.c, check_image_uuid.c, oemMD5Update.c), which reads past the end of the uploaded image, leaking adjacent memory and, per the CVSS availability impact, potentially crashing or bricking the flash-validation routine. …
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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