CVE-2020-37121

CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious M3U playlist file with 536 bytes of buffer and shellcode to trigger remote code execution.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://sourceforge.net/projects/codeblocks/
https://www.codeblocks.org/
https://www.exploit-db.com/exploits/48344
https://www.vulncheck.com/advisories/codeblocks-buffer-overflow-seh-unicode

Configurations

No configuration.

History

15 Apr 2026, 00:35

Type	Values Removed	Values Added
Summary		(es) CODE::BLOCKS 16.01 contiene una vulnerabilidad de desbordamiento de búfer que permite a los atacantes ejecutar código arbitrario sobrescribiendo Structured Exception Handler con caracteres Unicode manipulados. Los atacantes pueden crear un archivo de lista de reproducción M3U malicioso con 536 bytes de búfer y shellcode para desencadenar la ejecución remota de código.

05 Feb 2026, 22:15

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~9.8~~	v2 : unknown v3 : 5.5

05 Feb 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-05 17:16

Updated : 2026-04-15 00:35

NVD link : CVE-2020-37121

Mitre link : CVE-2020-37121

CVE.ORG link : CVE-2020-37121

JSON object : View

Products Affected

No product.

CWE

CWE-121

Stack-based Buffer Overflow

{"id": "CVE-2020-37121", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.7, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-02-05T17:16:06.730", "references": [{"url": "https://sourceforge.net/projects/codeblocks/", "source": "disclosure@vulncheck.com"}, {"url": "https://www.codeblocks.org/", "source": "disclosure@vulncheck.com"}, {"url": "https://www.exploit-db.com/exploits/48344", "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/codeblocks-buffer-overflow-seh-unicode", "source": "disclosure@vulncheck.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-121"}]}], "descriptions": [{"lang": "en", "value": "CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious M3U playlist file with 536 bytes of buffer and shellcode to trigger remote code execution."}, {"lang": "es", "value": "CODE::BLOCKS 16.01 contiene una vulnerabilidad de desbordamiento de b\u00fafer que permite a los atacantes ejecutar c\u00f3digo arbitrario sobrescribiendo Structured Exception Handler con caracteres Unicode manipulados. Los atacantes pueden crear un archivo de lista de reproducci\u00f3n M3U malicioso con 536 bytes de b\u00fafer y shellcode para desencadenar la ejecuci\u00f3n remota de c\u00f3digo."}], "lastModified": "2026-04-15T00:35:42.020", "sourceIdentifier": "disclosure@vulncheck.com"}