Security readout for executives and security teams
Plain-English summary
CVE-2021-35336 describes a flaw in Tieline IP Audio Gateway firmware 2.6.4.8 and earlier where an unauthenticated person may reach a sensitive web administration area using a high-privileged account. For executives, the concern is unauthorized control or visibility of an audio gateway if its web interface is reachable.
Executive priority
Treat as high priority for exposed or business-critical audio gateways. The issue involves unauthenticated access to privileged administration, but source evidence lacks CVSS, KEV status, and patch details.
Technical view
The CVE describes incorrect access control in the Tieline Web Administrative Interface. The record states unauthenticated access to a sensitive part of the system with a high-privileged account. Public metadata does not provide CVSS, CWE, detailed affected CPEs, or vendor patch information.
Likely exposure
Exposure is most likely where Tieline IP Audio Gateway 2.6.4.8 or earlier has its Web Administrative Interface reachable from untrusted networks. Public asset inventory may be incomplete because the CVE record lacks CPEs.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The linked public write-up title references default credentials and unauthorized remote access, but the bundle does not provide enough detail to assert broad exploitation.
Researcher notes
Primary gaps are missing CVSS, CWE, CPEs, vendor advisory, and patch status. Validate exposure through asset inventory and safe configuration review, not offensive testing. Do not assume all Tieline products are affected beyond the CVE title.
Mitigation direction
- Identify Tieline IP Audio Gateway devices and firmware versions.
- Check Tieline guidance for fixed firmware or configuration remediation.
- Restrict Web Administrative Interface access to trusted management networks.
- Remove internet exposure; require VPN or equivalent access control.
- Audit high-privilege and default credential usage on affected devices.
- Monitor administrative access logs for unexpected remote sessions.
Validation and detection
- Confirm whether any gateway runs firmware 2.6.4.8 or earlier.
- Verify the administrative web interface is not internet reachable.
- Review account configuration for default or shared high-privilege access.
- Check logs for unauthenticated or unexpected administrative activity.
- Document compensating controls where patch status is unknown.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-35336 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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
- https://pratikkhalane91.medium.com/use-of-default-credentials-to-unauthorised-remote-access-of-internal-panel-of-tieline-c1ffe3b3757cCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.