Is CVE-2023-51773 in the CISA KEV catalog?

No. CVE-2023-51773 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-51773?

CVE-2023-51773 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2023-51773?

CVE-2023-51773 has an EPSS score of 1.05% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-51773?

Upgrade bacnet stack to 1.3.2 or later.

CVE & CISA-KEV Catalog

CVE-2023-51773

CRITICAL

9.1

CVSS v3

NVD

Description

BACnet Stack before 1.3.2 has a decode function APDU buffer over-read in bacapp_decode_application_data in bacapp.c.

CWE-126Buffer Over-read

How to fix

Remediation Available

bacnet stackNVD

Affected:< 1.3.2Fixed in:1.3.2CVE-2023-51773derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.05%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Patch3

Release Notes1

github.com

Other references1

sourceforge.net

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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 2025-05-23.