What is CVE-2021-35336?

CVE-2021-35336 is a critical-severity vulnerability in Tieline Ip Audtio Gateway, classified under Initialization of a Resource with an Insecure Default. CVSS score: 9.8/10. Published 2021-07-01.

How severe is CVE-2021-35336?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-35336 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Tieline Ip Audtio Gateway

CVE-2021-35336

Tieline IP Audio Gateway 2.6.4.8 and below is affected by Incorrect Access Control. A vulnerability in the Tieline Web Administrative Interface could allow an unauthenticated user to access a sensitive part of the system with a high privileged account.

Published 2021-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.101 (95.5th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 95th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.101 · newest: 0.101 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-1188 — Initialization of a Resource with an Insecure Default

Public proof-of-concept exploits

References

pratikkhalane91.medium.com/use-of-default-credentials-to-unauthorised-remote-ac… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-35336?: CVE-2021-35336 is a critical-severity vulnerability in Tieline Ip Audtio Gateway, classified under Initialization of a Resource with an Insecure Default. CVSS score: 9.8/10. Published 2021-07-01.
How severe is CVE-2021-35336?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-35336 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.