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Threatist priority CRITICAL 0 HIGH 0 MEDIUM 1 LOW 1

Signals Exploited in the wild (KEV) 0 Patch available 1 No fix listed 1 Has CVE 2

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Impact type Code execution 1 Privilege escalation 0 Security bypass 0 Information disclosure 0 Tampering 0 Denial of service 0 Spoofing 0 Cross-site scripting 0 SQL injection 0

Attack vector Network 2 Adjacent network 0 Local 0 Physical 0

Requirements No authentication 2 No user interaction 1

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Weakness (CWE) CWE-122 Heap-based Buffer Overflow 1

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Vendor: socat × Clear all filters

TI-2026-40502 CVE-2026-56123 · GHSA-6r8c-w5mj-43hv

socat 1.8.0.0 - 1.8.1.1 Heap Buffer Overflow via SOCKS5 Reply Parser

Priority MEDIUM 41

socat versions 1.8.0.0 through 1.8.1.1 contain a heap-based buffer overflow vulnerability that allows a malicious SOCKS5 proxy server to overwrite adjacent heap memory by exploiting a sign-extension flaw in the DOMAINNAM…

CVSS 4.0CRITICAL 9.2· Network · No auth · No interaction · EPSS 0.00314 · Published 2026-06-25 · Fixed in 1.8.1.2 CWE-122

TI-2004-01360 CVE-2004-1484 · GHSA-v3f9-7x42-4vg2

Format string vulnerability in the _msg function in error.c in socat 1.4.0.3 and earlier…

Priority LOW 33

Format string vulnerability in the _msg function in error.c in socat 1.4.0.3 and earlier, when used as an HTTP proxy client and run with the -ly option, allows remote attackers or local users to execute arbitrary code vi…

CVSS 2.0MEDIUM 5.0· Network · No auth · Interaction — · EPSS 0.07293 · Published 2005-02-13 · No fix listed

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