CVE-2025-64512Public exploit

Code execution via PDF-directed pickle deserialization

Published Nov 10, 2025 · Updated Nov 10, 2025

Unsafe deserialization in pdfminer.six before 20251107 allows attackers to execute code by supplying a crafted PDF and pickle file. CMapDB._load_data() accepts a PDF-controlled CMap name, resolves it outside the bundled cmap directory, and passes the referenced gzip data to pickle.loads(). Processing the PDF is required; Linux and macOS also require the pickle at a known local path, while Windows can retrieve it from an attacker-controlled network location.

CVSS severity8.2
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in pdfminer.six before 20251107 allows attackers to execute code by supplying a crafted PDF and pickle file. CMapDB._load_data() accepts a PDF-controlled CMap name, resolves it outside the bundled cmap directory, and passes the referenced gzip data to pickle.loads(). Processing the PDF is required; Linux and macOS also require the pickle at a known local path, while Windows can retrieve it from an attacker-controlled network location.

The record

CVE
CVE-2025-64512
Published
Nov 10, 2025
Updated
Nov 10, 2025
Vendor
pdfminer
Product
pdfminer.six
Classifications
CWE-502, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 20251107

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

pdfminer · pdfminer.sixversion=< 20251107

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.6GitHub CNACVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
8.2GitHub AdvisoryCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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