{"id":"CVE-2026-33923","aliases":[],"cve":{"records":[{"id":"CVE-2026-33923","source":"Nozomi","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-03-24T16:06:11.951Z","published":"2026-10-29T10:46:27.450Z","modified":"2026-10-29T12:36:53.310Z"}],"publishers":[{"name":"Nozomi","role":"CNA","organizationId":"bec8025f-a851-46e5-b3a3-058e6b0aa23c","modified":"2026-10-29T10:46:27.450Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T12:36:53.310Z"}],"references":[{"url":"https://security.nozominetworks.com/NN-2026:21-01","tags":[],"source":"Nozomi"}],"weaknesses":[{"id":"CWE-347","description":"CWE-347 Improper Verification of Cryptographic Signature","source":"Nozomi"}],"applicability":[{"source":"Nozomi","statements":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nozomi_networks:guardian:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"26.4.0"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nozomi_networks:cmc:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"26.4.0"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-29T12:19:57.938573Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Update bundle signature bypass in Guardian/CMC before 26.4.0","titleSource":"Nozomi","descriptionSource":"Nozomi","description":"A signature verification vulnerability was discovered in the update installation functionality due to inconsistent validation of the update bundle contents. An attacker with administrative privileges can remotely supply a crafted update bundle that passes signature verification but runs an unsigned script when the bundle is installed. The script runs with root privileges, allowing the attacker to read or modify sensitive data, change the appliance configuration, or shut down the appliance.","score":7.5,"severity":"high","published":"2026-10-29T10:46:27.450Z","modified":"2026-10-29T12:36:53.310Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Nozomi Networks","name":"Guardian","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"26.4.0","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"Nozomi","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"},{"vendor":"Nozomi Networks","name":"CMC","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"26.4.0","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"Nozomi","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"}],"remediation":[{"text":"Upgrade to v26.4.0 or later.","source":"Nozomi","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"},{"text":"Use internal firewall features to limit access to the web management interface.","source":"Nozomi","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"},{"text":"Review all accounts with administrative privileges and delete unnecessary ones.","source":"Nozomi","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"},{"text":"Install update bundles only when they come from trusted Nozomi Networks sources.","source":"Nozomi","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"}],"references":["https://security.nozominetworks.com/NN-2026:21-01"],"sources":[{"name":"CVE","id":"CVE-2026-33923","modified":"2026-10-29T12:36:53.310Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"}],"assessments":[{"source":"Nozomi","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":7.5},{"source":"Nozomi","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2}],"sourceAffected":[],"observedAt":"2026-10-29T14:38:02.831Z","kev":{"status":"not-listed","checkedAt":"2026-10-30T22:45:31.166Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-10-29T11:00:34.675Z","attemptedAt":"2026-10-29T11:00:34.675Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-29T11:00:33.093Z","attemptedAt":"2026-10-29T11:00:33.093Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T11:00:33.232Z","attemptedAt":"2026-10-29T11:00:33.232Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-29T11:00:33.072Z","attemptedAt":"2026-10-29T11:00:33.072Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-112723","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-112723","modified":"Oct 29, 2026, 10:46:27 AM","score":7.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","checkedAt":"2026-10-29T11:00:33.232Z"}],"aiSummary":{"text":"A signature verification vulnerability in Nozomi Networks' Guardian and CMC products before version 26.4.0 allows an attacker with administrative privileges to supply a crafted update bundle, potentially reading or modifying sensitive data. The attacker must have administrative access. The vulnerability is due to inconsistent validation of update bundle contents.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:26:33.620Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-33923"}]}}