BACnet Stack up to 1.4.4/1.5.0/1.5.x BACnet/SC Header-Option Decoder bvlc_sc_decode_proprietary_option out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.22+

Summaryinfo

A vulnerability described as critical has been identified in BACnet Stack up to 1.4.4/1.5.0/1.5.x. Affected by this vulnerability is the function bvlc_sc_decode_proprietary_option of the component BACnet/SC Header-Option Decoder. Such manipulation leads to out-of-bounds. This vulnerability is uniquely identified as CVE-2026-58265. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in BACnet Stack up to 1.4.4/1.5.0/1.5.x and classified as critical. Affected by this issue is the function bvlc_sc_decode_proprietary_option of the component BACnet/SC Header-Option Decoder. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.5, 1.5.1, and 1.6.0, a BACnet/SC peer can trigger a heap out-of-bounds read (up to 3 bytes), pre-authentication, in the BACnet/SC header-option decoder. bvlc_sc_decode_proprietary_option() reads the vendor-id and option-type at fixed offsets [3],[4],[5] before checking the option's declared header length, and the option-list validator never enforces a minimum length for proprietary options. This issue has been patched in versions 1.4.5, 1.5.1, and 1.6.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-58265 since 06/29/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 1.4.5, 1.5.1 or 1.6.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: BACnet Stack 1.4.5/1.5.1/1.6.0

Timelineinfo

06/29/2026 CVE reserved
11/13/2026 +137 days Advisory disclosed
11/13/2026 +0 days VulDB entry created
11/13/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CNA: GitHub_M
CVE: CVE-2026-58265 (🔒)

GCVE (CVE): GCVE-0-2026-58265
GCVE (VulDB): GCVE-100-437162

Entryinfo

Created: 11/13/2026 17:17
Changes: 11/13/2026 17:17 (64)
Complete: 🔍
Cache ID: 216::103

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