CVE Explorer

CVE-2026-16771

In firmware versions 2.7.7 and earlier, the Arris BGW210‑700 gateway fails to enforce any server‑side authentication on its /cgi-bin/*.ha management endpoints, relying solely on client‑side 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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:48945ef1e576f21a076a5854caf25d61f347f64b63cce96d844f6c6fea828af4

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-306","description":"CWE-306 Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"CWE-306 Missing Authentication for Critical Function","lang":"en"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"Arris BGW210‑700","vendor":"AT&T","versions":[{"lessThanOrEqual":"2.7.7","status":"affected","version":"0","versionType":"custom"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-306","description":"CWE-306 Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"CWE-306 Missing Authentication for Critical Function","lang":"en"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"url":"https://kb.cert.org/vuls/id/141367"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/cna/references/0

{"url":"https://www.kb.cert.org/vuls/id/141367"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4526bfde5ddc9596d749e8cdb3822a0aea564b0406aae7dd6e2ce811fdd9618f · sha256:721ef8c94ca35674… · /containers/adp/1/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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