CVE-2026-45583: microsoft exchange_server Code Injection
CVSS: 8.1v3.1HighAnalyzed
Published 09-06-2026Last modified 24-09-2026
Vulnerability summary
CVE-2026-45583 is a high (CVSS 8.1) Code Injection vulnerability in microsoft exchange_server. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.4% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
0.70%
0%100%
Low · +0.17 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 24-09-2026Last modifiedVulnerability information updated.
Description
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 7.5–8.1
- CVE.orgCNA7.5HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CDiffers
EPSS trend
Probability
0.70%
Chance of exploitation in the next 30 days
Percentile
52%
Versus all other CVEs
30-day change
+0.17 pp
From 0.52% on 21-09-2026
21-09-202621-10-2026
EPSS score0.70%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft6 products
- exchange_server2016:cumulative_update_23 | 2019:cumulative_update_14 | 2019:cumulative_update_15
- exchange_server_subscription_edition< 15.02.2562.043
- microsoft exchange server 2016 cumulative update 23≥ 15.01.0.0, < 15.01.2507.071
- microsoft exchange server 2019 cumulative update 14≥ 15.02.0.0, < 15.02.1544.043
- microsoft exchange server 2019 cumulative update 15≥ 15.02.0.0, < 15.02.1748.048
1 vendor · 6 products
