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CVE-2026-54073— VeraCrypt: Hidden volume quick format weakens plausible deniability

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veracrypt组织的一款磁盘加密软件。 VeraCrypt 1.26.6版本至1.26.29之前版本存在处理逻辑错误漏洞，该漏洞源于文件托管隐藏卷创建时，FormatNoFs和FormatFat函数使用WriteFile在可预测的128 MiB间隔放置原始零扇区，绕过了正常的EncryptDataUnits格式化路径，留下确定性明文标记，可能削弱取证检查时的合理否认性。

CVSS 4.6 · Medium EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
veracrypt VeraCrypt >= 1.26.6, < 1.26.29 affected
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I. Basic Information for CVE-2026-54073

Vulnerability Information
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Vulnerability Title
VeraCrypt: Hidden volume quick format weakens plausible deniability
Source: CVE Program / CVE List V5
Vulnerability Description
VeraCrypt provides disk encryption with strong security based on TrueCrypt. From 1.26.6 until 1.26.29, file-hosted hidden volume creation forces quick format and the FormatNoFs function in src/Common/Format.c and FormatFat function in src/Common/Fat.c use WriteFile to place raw zeroed sectors at predictable 128 MiB intervals. These writes bypass the normal EncryptDataUnits formatting path, leaving deterministic plaintext markers in an area expected to resemble random ciphertext. The markers can weaken plausible deniability during forensic inspection, although they do not disclose hidden-volume content or reduce the strength of VeraCrypt encryption. This issue is fixed in version 1.26.29.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
VeraCrypt 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VeraCrypt是veracrypt组织的一款磁盘加密软件。 VeraCrypt 1.26.6版本至1.26.29之前版本存在处理逻辑错误漏洞，该漏洞源于文件托管隐藏卷创建时，FormatNoFs和FormatFat函数使用WriteFile在可预测的128 MiB间隔放置原始零扇区，绕过了正常的EncryptDataUnits格式化路径，留下确定性明文标记，可能削弱取证检查时的合理否认性。
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
veracrypt VeraCrypt >= 1.26.6, < 1.26.29 -

II. Public POCs for CVE-2026-54073

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III. Intelligence Information for CVE-2026-54073

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Patches & Fixes for CVE-2026-54073 (1)

Vendor Advisories for CVE-2026-54073 (1)

Vendor Pages for CVE-2026-54073 (1)

IV. Related Vulnerabilities

Same product: VeraCrypt
Same vendor: veracrypt
Same weakness: CWE-693

V. Comments for CVE-2026-54073

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