CVE-2026-16771

{"id": "CVE-2026-16771", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-16771", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-28T18:58:28.079223Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "cret@cert.org", "affectedData": [{"vendor": "AT&T", "product": "Arris BGW210\u2011700", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "2.7.7"}]}]}], "published": "2026-07-28T19:17:32.247", "references": [{"url": "https://kb.cert.org/vuls/id/141367", "source": "cret@cert.org"}, {"url": "https://www.kb.cert.org/vuls/id/141367", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-306"}]}], "descriptions": [{"lang": "en", "value": "In firmware versions 2.7.7 and earlier, the Arris BGW210\u2011700 gateway fails to enforce any server\u2011side authentication on its /cgi-bin/*.ha management endpoints, relying solely on client\u2011side CSS/JavaScript gating that can be bypassed by any HTTP client. This allows unauthenticated attackers on the LAN to read sensitive configuration data, modify persistent device settings, or trigger backend diagnostic operations. The issue appears systemic across the CGI handler chain."}], "lastModified": "2026-07-30T19:10:06.847", "sourceIdentifier": "cret@cert.org"}