CVE-2026-24857
CVE-2026-24857 is a critical-severity vulnerability in Simsong Bulk Extractor 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)
- CVSS v4: 5.5
- EPSS exploit prediction: 0% (29th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-4855
- Weakness: CWE-787
- Affected product: Simsong Bulk Extractor
- Published:
- Last modified:
Description
`bulk_extractor` is a digital forensics exploitation tool. Starting in version 1.4, `bulk_extractor`’s embedded unrar code has a heap‑buffer‑overflow in the RAR PPM LZ decoding path. A crafted RAR inside a disk image causes an out‑of‑bounds write in `Unpack::CopyString`, leading to a crash under ASAN (and likely a crash or memory corruption in production builds). There's potential for using this for RCE. As of time of publication, no known patches are available.
Frequently asked questions
- What is CVE-2026-24857?
- `bulk_extractor` is a digital forensics exploitation tool. Starting in version 1.4, `bulk_extractor`’s embedded unrar code has a heap‑buffer‑overflow in the RAR PPM LZ decoding path. A crafted RAR inside a disk image causes an out‑of‑bounds write in `Unpack::CopyString`, leading to a crash under ASAN (and likely a crash or memory corruption in production builds). There's potential for using this for RCE. As of time of publication, no known patches are available.
- How severe is CVE-2026-24857?
- CVE-2026-24857 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-2026-24857 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-24857?
- CVE-2026-24857 affects Simsong Bulk Extractor. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-24857?
- 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-2026-24857 have an EU (EUVD) identifier?
- Yes. CVE-2026-24857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4855.
- When was CVE-2026-24857 published?
- CVE-2026-24857 was published on 2026-01-28 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:simsong:bulk_extractor:*:*:*:*:*:*:*:*
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