CVE-2016-3067
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which...
CVE-2016-3067 is a critical vulnerability (CVSS 9.8) in Cygwin, published April 21, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.04%, the 81st percentile. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.0, NVD
- Exploit chance
- 2.04%EPSS, 81st percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
What each source reports
NVD Score used
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
- Record
CVE-2016-3067- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-264
- Updated
- 2026-11-02
CVE ListNo score
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
- Record
CVE-2016-3067- Updated
- 2026-11-02
EUVDEUVD-2016-4140No score
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
- Record
EUVD-2016-4140- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q582-cxmf-6cxr
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which...
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
- Record
GHSA-q582-cxmf-6cxr- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSV
Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
- Record
CVE-2016-3067- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
cygwin.com/ml/cygwin-announce/2016-04/msg00020.html
sourceware.org/git?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044
nvd.nist.gov/vuln/detail/CVE-2016-3067
github.com/advisories/GHSA-q582-cxmf-6cxr