The MSI installer for Python through 2.7.16 on Windows defaults to the C:\Python27 directory, which makes it easier for local users to deploy Trojan horse code
Published Jul 8, 2019
7.8
HIGHCVSS 3.0
EPSS 1.26%
Description
The MSI installer for Python through 2.7.16 on Windows defaults to the C:\Python27 directory, which makes it easier for local users to deploy Trojan horse code. (This also affects old 3.x releases before 3.5.) NOTE: the vendor's position is that it is the user's responsibility to ensure C:\Python27 access control or choose a different directory, because backwards compatibility requires that C:\Python27 remain the default for 2.7.x
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.26% (0.01261) | 68.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.26% (0.01261) | 65.66th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.16% (0.00157) | 33.13th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.05% (0.02055) | 73.17th | v4 (v2025.03.14) |
| Mar 28, 2025 | 0.16% (0.00157) | 33.17th | v4 (v2025.03.14) |
| Mar 27, 2025 | 2.05% (0.02055) | 81.78th | v4 (v2025.03.14) |
| Mar 20, 2025 | 0.29% (0.00293) | 49.94th | v4 (v2025.03.14) |
| Mar 19, 2025 | 2.05% (0.02055) | 81.97th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.29% (0.00293) | 50.62th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00060) | 27.69th | v3 (v2023.03.01) |
| Jun 6, 2024 | 0.06% (0.00060) | 25.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00060) | 23.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.40% (0.01404) | 72.10th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.40% (0.01404) | 72.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.40% (0.01404) | 69.97th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.40% (0.01404) | 49.02th | v2 (v2022.01.01) |
| Feb 3, 2022 | 10.21% (0.10210) | 87.43th | v1 |
| Jan 6, 2022 | 10.21% (0.10210) | 87.29th | v1 |
| Sep 1, 2021 | 10.21% (0.10210) | 95.03th | v1 |
| Apr 14, 2021 | 10.21% (0.10210) | 0.00th | v1 |
References (1)
- https://docs.python.org/2/faq/windows.html x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://docs.python.org/2/faq/windows.html | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.