MEDIUM
An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly handle web requests, aka "Microsoft Exchange Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server
Published May 9, 2018
5.4
MEDIUMCVSS 3.0
EPSS 3.58%
Description
An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly handle web requests, aka "Microsoft Exchange Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.
Affected products
-
- Version 2013 Cumulative Update 19StatusaffectedConstraints-
- Version 2013 Cumulative Update 20StatusaffectedConstraints-
- Version 2016 Cumulative Update 8StatusaffectedConstraints-
- Version 2016 Cumulative Update 9StatusaffectedConstraints-
- 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 Exchange Server | n/a |
|
OR
- 2013
- 2013
- 2016
- 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.
5.4 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact Low
Integrity Impact Low
Availability Impact None
5.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.58% 0.03579
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03579
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 (32 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.58% (0.03579) | 89.03th | v5 (v2026.06.15) |
| Sep 22, 2026 | 3.58% (0.03579) | 88.88th | v5 (v2026.06.15) |
| Sep 21, 2026 | 4.98% (0.04975) | 91.85th | v5 (v2026.06.15) |
| Sep 20, 2026 | 3.58% (0.03579) | 88.86th | v5 (v2026.06.15) |
| Sep 6, 2026 | 3.65% (0.03652) | 88.86th | v5 (v2026.06.15) |
| Sep 5, 2026 | 5.08% (0.05076) | 91.81th | v5 (v2026.06.15) |
| Aug 30, 2026 | 3.65% (0.03652) | 88.80th | v5 (v2026.06.15) |
| Aug 28, 2026 | 5.08% (0.05076) | 91.76th | v5 (v2026.06.15) |
| Aug 24, 2026 | 3.65% (0.03652) | 88.73th | v5 (v2026.06.15) |
| Aug 23, 2026 | 5.08% (0.05076) | 91.72th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.28% (0.03283) | 86.81th | v5 (v2026.06.15) |
| Sep 27, 2025 | 1.82% (0.01818) | 82.23th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.56% (0.00564) | 66.43th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.36% (0.00357) | 72.96th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.36% (0.00357) | 71.30th | v3 (v2023.03.01) |
| Jan 23, 2024 | 0.36% (0.00357) | 69.20th | v3 (v2023.03.01) |
| Sep 30, 2023 | 0.30% (0.00305) | 66.23th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.36% (0.00358) | 68.29th | v3 (v2023.03.01) |
| May 8, 2023 | 0.44% (0.00441) | 71.00th | v3 (v2023.03.01) |
| May 3, 2023 | 0.36% (0.00358) | 67.93th | v3 (v2023.03.01) |
| Mar 15, 2023 | 0.37% (0.00368) | 68.21th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.39% (0.00388) | 69.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.42% (0.06416) | 91.03th | v2 (v2022.01.01) |
| Aug 30, 2022 | 6.42% (0.06416) | 90.59th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.85% (0.05853) | 89.57th | v2 (v2022.01.01) |
| Mar 22, 2022 | 5.85% (0.05853) | 77.88th | v2 (v2022.01.01) |
| Feb 13, 2022 | 5.27% (0.05274) | 76.15th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.79% (0.04794) | 74.58th | v2 (v2022.01.01) |
| Feb 3, 2022 | 9.25% (0.09255) | 86.70th | v1 |
| Jan 6, 2022 | 9.25% (0.09255) | 86.54th | v1 |
| Sep 1, 2021 | 9.25% (0.09255) | 93.94th | v1 |
| Apr 14, 2021 | 9.25% (0.09255) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://www.securityfocus.com/bid/104056 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040850 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8159 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104056 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040850 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8159 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published May 9, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8159
CISA Vulnrichment
Updated n/a