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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2021-31886

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). FTP server does not properly validate the length of the “USER” command, leading to stack-based buffer overflows. This may result in Denial-of-Service conditions and Remote Code Execution. (FSMD-2021-0010)

CVSS 9.8 · CriticalBuzz score 21.9

Buzz score

Why this CVE is surfacing

Buzz score total 21.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 13.9 · diversity 8.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
13.9
3 evidence mentions in the snapshot
Diversity score
8.0
3 sources across 1 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
3 source links · newest first
  • Flaws in the Nucleus embedded TCP/IP stack puts critical systems at riskCSO Online

    Security researchers have uncovered serious vulnerabilities in the TCP/IP stack of a real-time operating system (RTOS) called Nucleus that’s used in safety-critical devices across many industry verticals. The flaws, discovered by researchers from Forescout and Medigate Labs, can lead to denial of service (DoS), information leaks and remote code execution (RCE). Collectively dubbed NUCLEUS:13, they […]

    newswww.csoonline.comNov 11, 2021, 10:00 AM
  • Vulnerabilities in Nucleus NET TCP/IP stack could lead to real-world damageHelp Net Security

    Researchers have unearthed 13 vulnerabilities affecting the Nucleus NET TCP/IP stack and have demonstrated how attackers could exploit them to cause serious real-world damage. The good news is that Siemens – the current owner of the stack – has released patches for all the vulnerabilities. The bad new is that it may take a while for these patches to be propagated downstream, i.e., for the patched Nucleus NET versions to be included in the various … More →

    newswww.helpnetsecurity.comNov 10, 2021, 1:03 PM
  • Many Healthcare, OT Systems Exposed to Attacks by NUCLEUS:13 VulnerabilitiesSecurityWeek

    A series of 13 vulnerabilities identified in the Nucleus TCP/IP stack could be exploited to execute code remotely, cause a denial of service condition, or to obtain sensitive information, enterprise device security firm Forescout warns.

    newswww.securityweek.comNov 9, 2021, 2:18 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

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