7.5

CVE-2023-20896: vmware vcenter_server Out-of-bounds Read

CVSS: 7.5v3.1HighModified
Published 22-06-2023Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2023-20896 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in vmware vcenter_server. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.90%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-06-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

The VMware vCenter Server contains an out-of-bounds read vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds read by sending a specially crafted packet leading to denial-of-service of certain services (vmcad, vmdird, and vmafdd).

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.90%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

-0.01 pp

From 0.91% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.90%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Vmware3 products
  • vcenter_serverEOL≥ 4.0, < 7.0 | 7.0 | 7.0:a | 7.0:b | 7.0:c | 7.0:d | 7.0:update1 | 7.0:update1a | 7.0:update1c | 7.0:update1d | 7.0:update2 | 7.0:update2a | 7.0:update2b | 7.0:update2c | 7.0:update2d | 7.0:update3 | 7.0:update3a | 7.0:update3c | 7.0:update3d | 7.0:update3e | 7.0:update3f | 7.0:update3g | 7.0:update3h | 7.0:update3i | 7.0:update3j | 7.0:update3k | 7.0:update3l | 8.0 | 8.0:a | 8.0:b | 8.0:c | 8.0:update1 | 8.0:update1a
  • vmware cloud foundation (vcenter server)≥ 5.x, < 7.0 U3m, 8.0 U1b | ≥ 4.x, < 7.0 U3m, 8.0 U1b
  • vmware vcenter server (vcenter server)≥ 8.0, < 8.0 U1b | ≥ 7.0, < 7.0 u3m

1 vendor · 3 products

References

2 links