{"id":"CVE-2026-34348","title":"Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.","summary":"Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-693"],"vendor":"microsoft","product":"windows_10_1809","affected":["windows_10_1809 < 10.0.17763.9020","windows_10_21h2 < 10.0.19044.7548","windows_10_22h2 < 10.0.19045.7548","windows_11_23h2 < 10.0.22631.7376","windows_11_24h2 < 10.0.26100.8875","windows_11_25h2 < 10.0.26200.8875","windows_11_26h1 < 10.0.28000.2269","windows_server_2019 < 10.0.17763.9020","windows_server_2022 < 10.0.20348.5386","windows_server_2025 < 10.0.26100.33158"],"patched":["windows_10_1809 10.0.17763.9020","windows_10_21h2 10.0.19044.7548","windows_10_22h2 10.0.19045.7548","windows_11_23h2 10.0.22631.7376","windows_11_24h2 10.0.26100.8875","windows_11_25h2 10.0.26200.8875","windows_11_26h1 10.0.28000.2269","windows_server_2019 10.0.17763.9020","windows_server_2022 10.0.20348.5386","windows_server_2025 10.0.26100.33158"],"published":"2026-07-14","updated":"2026-07-16","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-34348","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34348","label":"secure@microsoft.com"}],"tags":["nvd","exploit-available","cve.org"],"epss":0.00907,"epssPercentile":0.58375,"ingestedAt":"2026-07-17T13:12:08.561Z","exploits":{"github":1,"githubRepos":["https://github.com/HORKimhab/CVE-2026-34348"],"checkedAt":"2026-09-23T07:14:00.124Z"},"exploitAvailable":true,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-16T15:04:55.186927Z"},"slug":"CVE-2026-34348","body":"## Overview\n\nProtection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.\n\n## Affected\n\n- `windows_10_1809 < 10.0.17763.9020`\n- `windows_10_21h2 < 10.0.19044.7548`\n- `windows_10_22h2 < 10.0.19045.7548`\n- `windows_11_23h2 < 10.0.22631.7376`\n- `windows_11_24h2 < 10.0.26100.8875`\n- `windows_11_25h2 < 10.0.26200.8875`\n- `windows_11_26h1 < 10.0.28000.2269`\n- `windows_server_2019 < 10.0.17763.9020`\n- `windows_server_2022 < 10.0.20348.5386`\n- `windows_server_2025 < 10.0.26100.33158`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1809 10.0.17763.9020`\n- `windows_10_21h2 10.0.19044.7548`\n- `windows_10_22h2 10.0.19045.7548`\n- `windows_11_23h2 10.0.22631.7376`\n- `windows_11_24h2 10.0.26100.8875`\n- `windows_11_25h2 10.0.26200.8875`\n- `windows_11_26h1 10.0.28000.2269`\n- `windows_server_2019 10.0.17763.9020`\n- `windows_server_2022 10.0.20348.5386`\n- `windows_server_2025 10.0.26100.33158`","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":5127,"id":"CVE-2026-34348","ts":1788887249187,"field":"exploit_available","old":"false","new":"true"},{"seq":4010,"id":"CVE-2026-34348","ts":1788886364889,"field":"exploit_available","old":"true","new":"false"},{"seq":2822,"id":"CVE-2026-34348","ts":1788883031591,"field":"exploit_available","old":"false","new":"true"},{"seq":1851,"id":"CVE-2026-34348","ts":1788882434491,"field":"exploit_available","old":"true","new":"false"},{"seq":949,"id":"CVE-2026-34348","ts":1788881868522,"field":"exploit_available","old":"false","new":"true"}]}