VulnSocial

CVE-2026-87121

LOWCVSS 9.3 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-22: 109-22
Referenced assets1 URL
Full discourse1 post
  • Aviatrix Threat Research Center@aviatrixtrc

    Attackers exploiting CVE-2026-87121 in lwIP MQTT clients can achieve remote code execution without authentication across industrial networks. This critical vulnerability demonstrates how unencrypted industrial protocols enable lateral movement between compromised IoT devices. Runtime segmentation helps contain post-compromise activity. #CloudSecurity 🔗 Full TRC analysis: https://aviatrix.ai/threat-research-center/lwip-mqtt-cve-2026-87121-out-of-bounds-write-vulnerability

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