A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka "Skype for Business and Lync Security Feature Bypass Vulnerability." This affects Skype, Microsoft Lync
Published Jul 11, 2018
7.8
HIGHCVSS 3.0
EPSS 5.82%
Description
A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka "Skype for Business and Lync Security Feature Bypass Vulnerability." This affects Skype, Microsoft Lync.
Affected products
-
- Version 2013 Service Pack 1 (32-bit)StatusaffectedConstraints-
- Version 2013 Service Pack 1 (64-bit)StatusaffectedConstraints-
- Version
-
- Version Business 2016 (32-bit)StatusaffectedConstraints-
- Version Business 2016 (64-bit)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Microsoft Lync | n/a |
| |||||||||
| Microsoft | Skype | n/a |
|
- 2013
- 2016
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
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 v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.82% (0.05821) | 92.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.46% (0.05456) | 91.69th | v5 (v2026.06.15) |
| Jun 13, 2026 | 13.80% (0.13803) | 94.47th | v4 (v2025.03.14) |
| Apr 18, 2026 | 16.16% (0.16163) | 94.81th | v4 (v2025.03.14) |
| Apr 2, 2026 | 7.71% (0.07707) | 91.89th | v4 (v2025.03.14) |
| Jan 25, 2026 | 5.34% (0.05339) | 89.79th | v4 (v2025.03.14) |
| Dec 27, 2025 | 7.08% (0.07077) | 91.25th | v4 (v2025.03.14) |
| Nov 21, 2025 | 5.26% (0.05261) | 89.54th | v4 (v2025.03.14) |
| Nov 18, 2025 | 10.11% (0.10107) | 92.31th | v4 (v2025.03.14) |
| Jul 5, 2025 | 5.26% (0.05261) | 89.52th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.70% (0.06697) | 90.33th | v4 (v2025.03.14) |
| Mar 29, 2025 | 19.66% (0.19661) | 92.53th | v4 (v2025.03.14) |
| Mar 19, 2025 | 6.70% (0.06697) | 90.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.86% (0.02860) | 85.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.43% (0.00425) | 75.15th | v3 (v2023.03.01) |
| May 20, 2024 | 0.40% (0.00404) | 73.59th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.28% (0.00284) | 67.81th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.28% (0.00284) | 64.66th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00334) | 66.58th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.71% (0.05708) | 90.31th | v2 (v2022.01.01) |
| May 23, 2022 | 5.20% (0.05203) | 88.77th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.03% (0.04026) | 68.00th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.70% (0.06701) | 83.28th | v5 (v2026.06.15) |
| Apr 14, 2021 | 6.70% (0.06701) | 0.00th | v1 |
No CWE recorded.
References (2)
- http://www.securityfocus.com/bid/104619 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8238 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104619 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8238 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.