CVE Watch14 oct 2026

CVE-2026-73261

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TCP/IP stack enabled by MG_ENABLE_TCPIP in src/net_built

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

0-100

Publicado: 14 oct 2026 · Última mod.: 14 oct 2026 · CWE-20 · CWE-125

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TCP/IP stack enabled by MG_ENABLE_TCPIP in src/net_builtin.c does not reject a TCP option whose declared opts[1] length exceeds the remaining option bytes. In handle_opt(), a NOP followed by a truncated MSS option causes opts[3] to be read outside the declared options area and used as the low byte of dmss. An unauthenticated remote peer can corrupt the per-connection MSS value so later mg_send() calls transmit truncated or zero-length application payloads while the TCP connection otherwise appears healthy. This issue is fixed in version 7.23.

Referencias oficiales

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