CVE-2026-42484
CVE-2026-42484 is a critical-severity vulnerability in Hashcat with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 0% (36th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26531
- Weakness: CWE-787
- Affected product: Hashcat
- Published:
- Last modified:
Description
A heap-based buffer overflow in hex_to_binary in the PKZIP hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted PKZIP hash file. The issue affects modules 17200, 17210, 17220, 17225, and 17230. When data_type_enum<=1, attacker-controlled hex data from a user-supplied hash string is decoded into a fixed-size buffer without proper input-length validation.
Frequently asked questions
- What is CVE-2026-42484?
- A heap-based buffer overflow in hex_to_binary in the PKZIP hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted PKZIP hash file. The issue affects modules 17200, 17210, 17220, 17225, and 17230. When data_type_enum<=1, attacker-controlled hex data from a user-supplied hash string is decoded into a fixed-size buffer without proper input-length validation.
- How severe is CVE-2026-42484?
- CVE-2026-42484 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-42484 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42484?
- CVE-2026-42484 affects Hashcat. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-42484?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-42484 have an EU (EUVD) identifier?
- Yes. CVE-2026-42484 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26531.
- When was CVE-2026-42484 published?
- CVE-2026-42484 was published on 2026-05-01 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:hashcat:hashcat:7.1.2:*:*:*:*:*:*:*
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