Is CVE-2023-34048 in the CISA KEV catalog?

Yes. CVE-2023-34048 is on the CISA Known Exploited Vulnerabilities list, added 2024-01-22.

What is the CVSS severity of CVE-2023-34048?

CVE-2023-34048 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-34048?

CVE-2023-34048 has an EPSS score of 99.43% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2023-34048?

No published fix for CVE-2023-34048 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2024-02-12. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2023-34048

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds write potentially leading to remote code execution.

CWE-787Out-of-bounds Write

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Federal remediation due: 2024-02-12

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.43%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

VMware vCenter Server Out-of-Bounds Write Vulnerability

VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol that allows an attacker to conduct remote code execution.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Remediation due: 2024-02-12

References

Exploit1

vicarius.io

Vendor Advisory1

vmware.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.