Security readout for executives and security teams
This flaw affects Cisco optical networking equipment running specific 4.6 software releases. If a TL1 account has a blank password, a remote person may be able to log in by supplying a password longer than 10 characters. The business concern is unauthorized access to network management functions on legacy carrier infrastructure. Exposure is likely limited to organizations still operating the named Cisco ONS platforms and software versions, especially where TL1 management is reachable beyond a tightly controlled management network and any account has a blank password. Treat as high priority if these legacy Cisco ONS systems remain in production. The vulnerable condition is configuration-dependent, but successful access could affect network management infrastructure. Validate inventory and account state before assuming exposure. Mitigation focus: Remove or disable all TL1 accounts with blank passwords.; Restrict TL1 access to trusted management networks only.; Review Cisco advisory guidance for fixed software or supported workarounds..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Credential and access behavior lookup
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Open ATT&CK lookupCVE-2004-1436 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- cisco-ons-tl1-auth-bypass(16766)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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