The IsDriveLetterAvailable method in Driver/Ntdriver.c in TrueCrypt 7.0, VeraCrypt before…
Priority LOW 36CWE-264Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
The IsDriveLetterAvailable method in Driver/Ntdriver.c in TrueCrypt 7.0, VeraCrypt before 1.15, and CipherShed, when running on Windows, does not properly validate drive letter symbolic links, which allows local users to mount an encrypted volume over an existing drive letter and gain privileges via an entry in the /GLOBAL?? directory.
Why it matters now
EPSS 0.01205 68th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ciphershed:ciphershed:*:*:*:*:*:*:*:* | up to 0.7.5.0 | Vulnerable | Ciphershed |
| cpe:2.3:a:idrix:veracrypt:*:*:*:*:*:*:*:* | up to 1.14 | Vulnerable | IDRIX |
| cpe:2.3:a:truecrypt:truecrypt:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Truecrypt |
| cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:* | all versions | Running on | Microsoft |
- cpe:2.3:a:ciphershed:ciphershed:*:*:*:*:*:*:*:* Versions up to 0.7.5.0 Vulnerable ·Ciphershed
- cpe:2.3:a:idrix:veracrypt:*:*:*:*:*:*:*:* Versions up to 1.14 Vulnerable ·IDRIX
- cpe:2.3:a:truecrypt:truecrypt:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Truecrypt
- cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:* Versions all versions Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-7358
- 2026-10-03 Alias added: GHSA-4c78-fxq8-6rxg
References
Exploit 1
Advisory 5
- https://veracrypt.codeplex.com/wikipage?title=Release%20Notes
- [oss-security] 20150924 Re: CVE Request - TrueCrypt 7.1a and VeraCrypt 1.14 Local Elevation of Privilege
- http://packetstormsecurity.com/files/133878/Truecrypt-7-Derived-Code-Windows-Drive-Letter-Symbolic-Link-Creation-Privilege-Escalation.html
- [oss-security] 20150922 CVE Request - TrueCrypt 7.1a and VeraCrypt 1.14 Local Elevation of Privilege
- https://code.google.com/p/google-security-research/issues/detail?id=538
Sources
- CVE-2015-7358 · CVE Program
- CVE-2015-7358 · NVD
- FIRST EPSS
- GHSA-4c78-fxq8-6rxg · GitHub Advisory Database · CC BY 4.0
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