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CVE-2026-73325— Fujitsu OneCompression < 1.2.1 Arbitrary Code Execution via torch.load Deserialization

Quick assessment

Affected
Fujitsu Research OneCompression
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fujitsu One Compression是日本Fujitsu公司的一款数据压缩软件。 Fujitsu One Compression 1.2.0版本存在反序列化注入漏洞，该漏洞源于不安全的反序列化，QuantizedModelLoader.load_quantized_model_pt()无条件调用torch.load且weights_only=False，使用Python pickle机制反序列化，攻击者可通过提供特制的model.pt检查点文件嵌入恶意__reduce__方法，导致执行任意Pyt

CVSS 7.8 · High EPSS 0.26% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
Fujitsu Research OneCompression < 1.2.1 affected
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I. Basic Information for CVE-2026-73325

Vulnerability Information
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Vulnerability Title
Fujitsu OneCompression < 1.2.1 Arbitrary Code Execution via torch.load Deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
Fujitsu Research's OneCompression library before 1.2.1 contains an unsafe deserialization vulnerability that allows attackers to execute arbitrary code by supplying a crafted model.pt checkpoint file, as QuantizedModelLoader.load_quantized_model_pt() unconditionally calls torch.load with weights_only=False, invoking Python's pickle machinery during deserialization. Attackers can embed malicious __reduce__ methods in a crafted model checkpoint to execute arbitrary Python code, including system commands, when the library loads the file from a caller-selected model directory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Fujitsu One Compression 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fujitsu One Compression是日本Fujitsu公司的一款数据压缩软件。 Fujitsu One Compression 1.2.0版本存在反序列化注入漏洞，该漏洞源于不安全的反序列化，QuantizedModelLoader.load_quantized_model_pt()无条件调用torch.load且weights_only=False，使用Python pickle机制反序列化，攻击者可通过提供特制的model.pt检查点文件嵌入恶意__reduce__方法，导致执行任意Pyt
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fujitsu Research OneCompression 0 ~ 1.2.1 -

II. Public POCs for CVE-2026-73325

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9837 chars
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III. Intelligence Information for CVE-2026-73325

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Vendor Advisories for CVE-2026-73325 (1)

News Coverage for CVE-2026-73325 (1)

IV. Related Vulnerabilities

Same weakness: CWE-502

V. Comments for CVE-2026-73325

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