CVE-2026-54073

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.

CVSS 4.0

4.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

CWE

CWE-693

Published

2026-08-21

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

References

• https://github.com/veracrypt/VeraCrypt/commit/689a59cd584f090ca5f9214d5f2f3a9eac499e53
• https://github.com/veracrypt/VeraCrypt/releases/tag/VeraCrypt_1.26.29
• https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-jjcr-75w7-58jp
• https://github.com/veracrypt/VeraCrypt/security/advisories/GHSA-jjcr-75w7-58jp

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