CVE-2026-28525— SWUpdate Integer Underflow in Multipart Upload Parser
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I. Basic Information for CVE-2026-28525
Vulnerability Information
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Vulnerability Title
SWUpdate Integer Underflow in Multipart Upload Parser
Source: NVD (National Vulnerability Database)
Vulnerability Description
SWUpdate contains an integer underflow vulnerability in the multipart upload parser in mongoose_multipart.c that allows unauthenticated attackers to cause a denial of service by sending a crafted HTTP POST request to /upload with a malformed multipart boundary and controlled TCP stream timing. Attackers can trigger an integer underflow in the mg_http_multipart_continue_wait_for_chunk() function when the buffer length falls within a specific range, causing an out-of-bounds heap read that writes data beyond the allocated receive buffer to a local IPC socket.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数下溢(超界折返)
Source: NVD (National Vulnerability Database)
Vulnerability Title
SWUpdate 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SWUpdate是Stefano Babic个人开发者的一个嵌入式Linux系统更新工具。 SWUpdate存在缓冲区错误漏洞，该漏洞源于mongoose_multipart.c中多部分上传解析器的整数下溢，允许未经身份验证的攻击者通过发送特制HTTP POST请求到/upload导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-28525
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IV. Related Vulnerabilities
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