EUVD-2026-26529CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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5DescriptionNVD
A stack-based buffer overflow in mangle_to_hex_lower() and mangle_to_hex_upper() in src/rp_cpu.c in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted rule file, or via the -j or -k rule options used with password candidates of 128 or more characters. The vulnerability is caused by a bounds check that fails to account for the 2x expansion that occurs when password bytes are converted to hexadecimal.
AnalysisAI
Stack-based buffer overflow in hashcat 7.1.2's rule processing functions enables remote code execution when processing password candidates of 128+ characters. The vulnerability stems from inadequate bounds checking in mangle_to_hex_lower() and mangle_to_hex_upper() functions that fail to account for 2x memory expansion during byte-to-hex conversion. …
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RemediationAI
Within 24 hours: Immediately discontinue use of hashcat 7.1.2 in production and isolated environments until patched; inventory all systems running hashcat and document exposure scope. Within 7 days: Isolate or air-gap any hashcat instances that cannot be immediately decommissioned; restrict network access to hashcat servers to trusted internal networks only; review logs for suspicious rule files or inputs exceeding 128 characters. …
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