CVE-2020-17144
Microsoft Exchange Remote Code Execution Vulnerability
Microsoft Exchange Remote Code Execution Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Exchange Remote Code Execution Vulnerability
Microsoft Exchange Remote Code Execution Vulnerability
- Record
CVE-2020-17144- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C - Weakness
- CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2020-9098
Microsoft Exchange Remote Code Execution Vulnerability
- Record
EUVD-2020-9098- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-68q4-hg7f-7p9c
, aka 'Microsoft Exchange Remote Code Execution Vulnerability'. This CVE ID is unique from CVE...
, aka 'Microsoft Exchange Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-17117, CVE-2020-17132, CVE-2020-17141, CVE-2020-17142.
- Record
GHSA-68q4-hg7f-7p9c- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-94, CWE-502
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server improperly validates cmdlet arguments which allow an attacker to perform remote code execution.
- Record
CVE-2020-17144- Weakness
- CWE-502
- Updated
- 2026-11-02
NVD
Microsoft Exchange Remote Code Execution Vulnerability
- Record
CVE-2020-17144- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.0 Medium
AV:N/AC:M/Au:S/C:P/I:P/A:P - Weakness
- CWE-502
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Airboi/CVE-2020-17144-EXP | 2020-12-09 |
| PoC in GitHub | zcgonvh/CVE-2020-17144 | 2020-12-09 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-17144 is a high vulnerability (CVSS 8.4) in Microsoft Exchange Server, published December 9, 2020. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 36.5%, the 98th percentile. No source names a fixed version.