CVE
BACnet Stack: Loop reference to long Structured View description causes stack-buffer-overflow
Affects bacnet-stack on the master branch and releases up to 1.6.0-rc1 when a Loop object reads a referenced Structured View description that is a long string. Fixed in 1.4.4, 1.5.1 and 1.6.0.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 1.4.4, 1.5.1, 1.6.0
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 1.4.4, 1.5.1, 1.6.0.
- Published
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 25/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
BACnet Stack, an open source BACnet protocol library for embedded systems, has a stack-buffer-overflow that can be triggered remotely, without logging in, when a Loop object reads a long attacker-controlled Structured View description through its default timer path. Exploitation could crash the affected software or let an attacker corrupt memory, and the flaw is fixed in later releases.
Read the original description
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.4, 1.5.1, and 1.6.0, a stack-buffer-overflow can be triggered in the current master branch when a Loop object reads a referenced property through its default timer path and the referenced property is OBJECT_STRUCTURED_VIEW / PROP_DESCRIPTION containing a long attacker-controlled string. This issue has been patched in versions 1.4.4, 1.5.1, and 1.6.0.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.2/10CVSS 8.2
- No patch0/5No signal
What would change the score
- Would score about 70 if added to CISA KEV
- Would score about 65 if CISA's SSVC rates exploitation active
- Would score about 30 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 1.4.4, 1.5.1, 1.6.0.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-47710 (BACnet Stack: Loop reference to long Structured View description causes stack-buffer-overflow), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-47710 (entry last updated 2026-11-12):
Affected:
- bacnet-stack bacnet-stack: fixed in 1.4.4; fixed in 1.5.1; fixed in 1.6.0
Fixed versions: 1.4.4, 1.5.1, 1.6.0.
Conditions (all must be true for the bug to be hit):
- Loop object reads a referenced property through its default timer path (the referenced property is OBJECT_STRUCTURED_VIEW / PROP_DESCRIPTION with a long string) (source: https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2xm5-gjpc-9m6q)
- Affected versions are the current master branch and releases up to 1.6.0-rc1 (source: https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2xm5-gjpc-9m6q)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, no login, no user action.
CISA KEV: CVE-2026-47710 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-47710 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2xm5-gjpc-9m6q
- https://github.com/bacnet-stack/bacnet-stack/pull/1355
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-47710
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-47710"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- bacnet-stack bacnet-stack
fixed in 1.4.4; fixed in 1.5.1; fixed in 1.6.0
Evidence 4
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Other links · 1
- Repository
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-47710
Is CVE-2026-47710 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A long Structured View description read through a Loop object's default timer path overflows a stack buffer, corrupting memory in the server. The result is a crash and denial of service.Source: github.com
Which versions are affected by CVE-2026-47710?
bacnet-stack: before 1.4.4; before 1.5.1; before 1.6.0.Source: cve.now feed data
Am I affected, and how do I check?
The affected code is the master branch and releases up to 1.6.0-rc1 of bacnet-stack. A reader can check the bacnet-stack version in use, and whether their setup has Loop objects that reference a Structured View description property.Source: github.com
How do I fix CVE-2026-47710?
Upgrade to bacnet-stack 1.4.4, 1.5.1, or 1.6.0, matching the release line in use.Source: github.com