Deserialization in Microsoft Exchange Server
CVE-2019-1373
A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell, aka 'Microsoft Exchange Remote Code Execution Vulnerability'.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.217 (97.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.214 · newest: 0.217 · change: +0.003
Affected products
- Microsoft Exchange Server — versions 2013, 2016, 2019
- Microsoft Exchange Server 2013 — versions Cumulative Update 23
- Microsoft Exchange Server 2016 — versions Cumulative Update 13
- Microsoft Exchange Server 2016 Cumulative Update 14 — versions unspecified
- Microsoft Exchange Server 2019 — versions Cumulative Update 2
- Microsoft Exchange Server 2019 Cumulative Update 3 — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1373 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-1373?
- CVE-2019-1373 is a critical-severity vulnerability in Microsoft Exchange Server, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2019-11-12.
- How severe is CVE-2019-1373?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-1373 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.