VeraCrypt up to 1.26.28 Hidden Volume Creation src/Common/Format.c FormatNoFs random values

CVSS Meta Temp Score
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CTI Interest Score
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1.9$0-$5k1.00

Summaryinfo

A vulnerability marked as problematic has been reported in VeraCrypt up to 1.26.28. The impacted element is the function FormatNoFs of the file src/Common/Format.c of the component Hidden Volume Creation. The manipulation leads to random values. This vulnerability is documented as CVE-2026-54073. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in VeraCrypt up to 1.26.28. It has been rated as problematic. This issue affects the function FormatNoFs of the file src/Common/Format.c of the component Hidden Volume Creation. The manipulation with an unknown input leads to a random values vulnerability. Using CWE to declare the problem leads to CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. Impacted is confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-54073 since 06/11/2026. The exploitation is known to be difficult. An attack has to be approached locally. The exploitation needs additional levels of successful authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

Upgrading to version 1.26.29 eliminates this vulnerability.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 1.9
VulDB Meta Temp Score: 1.9

VulDB Base Score: 1.9
VulDB Temp Score: 1.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Random values
CWE: CWE-330 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: VeraCrypt 1.26.29

Timelineinfo

06/11/2026 CVE reserved
08/21/2026 +71 days Advisory disclosed
08/21/2026 +0 days VulDB entry created
08/21/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-54073 (🔒)
GCVE (CVE): GCVE-0-2026-54073
GCVE (VulDB): GCVE-100-394181

Entryinfo

Created: 08/21/2026 21:14
Changes: 08/21/2026 21:14 (68)
Complete: 🔍
Cache ID: 216::103

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