{"id":"CVE-2026-30803","title":"Integer Underflow (Wrap or Wraparound) vulnerability in RTI Connext Micro (Core Libraries) allows Overread Buffers","summary":"Integer Underflow (Wrap or Wraparound) vulnerability in RTI Connext Micro (Core Libraries) allows Overread Buffers. This issue affects Connext Micro: from 4.0.0 before 4.3.0.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-191"],"vendor":"rti","product":"connext_micro","affected":["connext_micro >= 4.0.0, < 4.3.0"],"patched":["connext_micro 4.3.0"],"published":"2026-06-17","updated":"2026-09-22","sourceUpdated":"2026-09-22T18:17:13.680","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-30803","references":[{"url":"https://www.rti.com/vulnerabilities/#cve-2026-30803","label":"3f572a00-62e2-4423-959a-7ea25eff1638"}],"tags":["nvd","cve.org"],"epss":0.00296,"epssPercentile":0.22518,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-06-17T17:58:11.377761Z"},"scores":{"nvd":9.1,"cna":8.8},"ingestedAt":"2026-09-22T18:08:12.471Z","slug":"CVE-2026-30803","body":"## Overview\n\nInteger Underflow (Wrap or Wraparound) vulnerability in RTI Connext Micro (Core Libraries) allows Overread Buffers. This issue affects Connext Micro: from 4.0.0 before 4.3.0.\n\n## Affected\n\n- `connext_micro >= 4.0.0, < 4.3.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `connext_micro 4.3.0`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":209307,"id":"CVE-2026-30803","ts":1790104185770,"field":"cvss","old":"8.8","new":"9.1"},{"seq":209306,"id":"CVE-2026-30803","ts":1790104185770,"field":"severity","old":"high","new":"critical"}]}