Classification: Severe, Solution: Official Fix, Exploit Maturity: Not Defined, CVSSv3.1: 9.8, CVEs: CVE-2026-87121, CVE-2026-91018, Summary: Two memory-safety vulnerabilities affect lwIP versions 2.0.1–2.2.1. CVE-2026-87121 is an out-of-bounds write in the MQTT client that could allow an unauthenticated network attacker to execute code on an affected device. CVE-2026-91018 is an adjacent-network double-free vulnerability that could cause denial of service, memory corruption or code execution…
View CSAF Summary Successful exploitation of this vulnerability could result in a system crash, a DoS, or memory corruption, which could lead to code execution on the victim system. The following versions of lwIP (Lightweight IP) are affected: API >=2.0.1|<=2.2.1 (CVE-2026-91018) CVSS Vendor Equipment Vulnerabilities v3 8.8 lwIP lwIP (Lightweight IP) Double Free Background Critical Infrastructure Sectors: Chemical, Communications, Critical Manufacturing, Energy, Financial Services, Healthcare…