CVE-2023-35388: microsoft exchange_server Deserialization of Untrusted Data
CVSS: 8.0v3.1HighModified
Published 08-08-2023Last modified 10-08-2026
Vulnerability summary
CVE-2023-35388 is a high (CVSS 8.0) Deserialization of Untrusted Data vulnerability in microsoft exchange_server. EPSS estimates a 6.85% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities.
CVSS score
8.0/10
010
High · v3.1 (CVE.org)EPSS score
6.85%
0%100%
Low · +0.06 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 08-08-2023PublishedVulnerability first disclosed.
- 10-08-2026Last modifiedVulnerability information updated.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.0HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
6.85%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
+0.06 pp
From 6.79% on 21-09-2026
21-09-202621-10-2026
EPSS score6.85%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft4 products
- exchange_server2016:cumulative_update_23 | 2019:cumulative_update_12 | 2019:cumulative_update_13
- microsoft exchange server 2016 cumulative update 23≥ 15.01.0, < 15.01.2507.032
- microsoft exchange server 2019 cumulative update 12≥ 15.02.0, < 15.02.1118.037
- microsoft exchange server 2019 cumulative update 13≥ 15.02.0, < 15.02.1258.025
1 vendor · 4 products
