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CVE-2026-77572— VeraCrypt: Missing authorization on veracrypt.sys IOCTLs exposes disk topology, symlink targets, and DeviceObject reference count to any client of \\.\VeraCrypt

Quick assessment

Affected
veracrypt VeraCrypt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

VeraCrypt 是一款基于 TrueCrypt 的磁盘加密工具，提供强安全性保护。在 1.26.29 及更早版本中，VeraCrypt 的 Windows 驱动程序 veracrypt.sys 中存在多个选定的元数据 IOCTL（输入输出控制码）处理程序，它们接受了用户提供的对象管理器和设备路径，这些路径的范围超出了 VeraCrypt 正常工作流所要求的限制。 本地用户若能以预期允许用户访问的方式打开设备 \.\VeraCrypt，便可通过调用 TC_IOCTL_GET_RESOLVED_SYMLINK、TC

CVSS 3.3 · Low

Affected Version Matrix 1

VendorProduct Version RangeStatus
veracrypt VeraCrypt <= 1.26.29 affected
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I. Basic Information for CVE-2026-77572

Vulnerability Information
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Vulnerability Title
VeraCrypt: Missing authorization on veracrypt.sys IOCTLs exposes disk topology, symlink targets, and DeviceObject reference count to any client of \\.\VeraCrypt
Source: CVE Program / CVE List V5
Vulnerability Description
VeraCrypt provides disk encryption with strong security based on TrueCrypt. In 1.26.29 and earlier, selected metadata IOCTL handlers in the VeraCrypt Windows veracrypt.sys driver accept caller-supplied object-manager and device paths broader than supported VeraCrypt workflows require. A local user who can open the intentionally user-accessible \.\VeraCrypt device can use TC_IOCTL_GET_RESOLVED_SYMLINK, TC_IOCTL_GET_DRIVE_PARTITION_INFO, VC_IOCTL_GET_DRIVE_GEOMETRY_EX, or the legacy TC_IOCTL_GET_DRIVE_GEOMETRY handler to make src/Driver/Ntdriver.c perform kernel-context symbolic-link or disk-device lookups outside the intended path scope. This can disclose low-sensitivity drive-letter targets, partition information, disk geometry, GPT or MBR state, and limited object-manager path metadata.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
veracrypt VeraCrypt <= 1.26.29 -

II. Public POCs for CVE-2026-77572

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III. Intelligence Information for CVE-2026-77572

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Patches & Fixes for CVE-2026-77572 (1)

Vendor Pages for CVE-2026-77572 (1)

Other References for CVE-2026-77572 (1)

IV. Related Vulnerabilities

Same product: VeraCrypt
Same vendor: veracrypt
Same weakness: CWE-200

V. Comments for CVE-2026-77572

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