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CVE-2026-53762— VeraCryp: wolfCrypt backend bypasses VeraCrypt PBKDF2 iteration count (non-default WOLFCRYPT=1 builds)

Quick assessment

Affected
veracrypt VeraCrypt
Exploitation
Public or AI PoC available; prioritize validation
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 1.26.29之前版本存在加密问题漏洞，该漏洞源于在WOLFCRYPT=1和WOLFCRYPT_BACKEND非默认构建中，SHA-256和SHA-512卷头密钥派生时配置的迭代次数被丢弃，使用wc_HKDF代替PBKDF2-HMAC，导致更改PIM或迭代次数不会增加派生成本，攻击者可对受影响的容器、磁盘映像或卷头进行更廉价的离线密码猜测。

CVSS 6.2 · Medium EPSS 0.08% · P0

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
veracrypt VeraCrypt < 1.26.29 affected
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I. Basic Information for CVE-2026-53762

Vulnerability Information
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Vulnerability Title
VeraCryp: wolfCrypt backend bypasses VeraCrypt PBKDF2 iteration count (non-default WOLFCRYPT=1 builds)
Source: CVE Program / CVE List V5
Vulnerability Description
VeraCrypt provides disk encryption with strong security based on TrueCrypt. Prior to 1.26.29, non-default builds created with WOLFCRYPT=1 and WOLFCRYPT_BACKEND route SHA-256 and SHA-512 volume-header key derivation through derive_key_sha256 and derive_key_sha512 in src/Crypto/wolfCrypt.c, where the configured iterations value is discarded and wc_HKDF is used instead of PBKDF2-HMAC. Changing the PIM or iteration count therefore does not increase derivation cost, allowing an attacker with an affected container, disk image, or volume header to perform substantially cheaper offline password guesses. Official precompiled VeraCrypt binaries and normal distribution packages use the standard PBKDF2 backend and are not affected. Volumes created by an affected WOLFCRYPT=1 build require backup and recreation because corrected builds derive different keys. This issue is fixed in version 1.26.29.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用具有不充分计算复杂性的口令哈希
Source: CVE Program / CVE List V5
Vulnerability Title
VeraCrypt 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VeraCrypt是veracrypt组织的一款磁盘加密软件。 VeraCrypt 1.26.29之前版本存在加密问题漏洞，该漏洞源于在WOLFCRYPT=1和WOLFCRYPT_BACKEND非默认构建中，SHA-256和SHA-512卷头密钥派生时配置的迭代次数被丢弃，使用wc_HKDF代替PBKDF2-HMAC，导致更改PIM或迭代次数不会增加派生成本，攻击者可对受影响的容器、磁盘映像或卷头进行更廉价的离线密码猜测。
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 < 1.26.29 -

II. Public POCs for CVE-2026-53762

# POC Description Source Link Shenlong Link
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Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
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claude_code · 7139 chars
GitHub 复现环境（可 clone 直接跑）
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POC zip download
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III. Intelligence Information for CVE-2026-53762

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Patches & Fixes for CVE-2026-53762 (1)

Vendor Advisories for CVE-2026-53762 (1)

Vendor Pages for CVE-2026-53762 (1)

IV. Related Vulnerabilities

Same product: VeraCrypt
Same vendor: veracrypt
Same weakness: CWE-916

V. Comments for CVE-2026-53762

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