CVE-2023-21709 Details
A vulnerability was found in Microsoft Exchange Server 2016 CU23/2019 CU12/2019 CU13 (Groupware Software). It has been classified as very critical. Affected is some unknown processing. Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2023-21709
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
1.86 Probability of exploitation activity being observed over the next 30 days (77th percentile)
CVSS score for CVE-2023-21709
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.8 Critical
Products affected by CVE-2023-21709
Exchange Server 2016
Exchange Server 2019
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2023-21709 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 1,327 15.92%
FR 1,252 15.02%
DE 1,070 12.83%
RU 876 10.51%
GB 328 3.93%
IT 275 3.30%
CN 261 3.13%
AT 205 2.46%
AU 182 2.18%
HK 173 2.08%

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CVE-2023-21709 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 2,531 72.13%
Technology 552 15.73%
Manufacturing 66 1.88%
Government/Politics 61 1.74%
Business Services 37 1.05%
Engineering 35 1.00%
Energy/Resources 33 0.94%
Finance 31 0.88%
Utilities 29 0.83%
Healthcare/Wellness 21 0.60%

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