CVE-2020-3923
CRITICALCVSS 9.8/10EPSS 1.68%
Last modified
CVE-2020-3923 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.. EPSS estimates a 1.68% chance of exploitation in the next 30 days.
Description
DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tonnet | Tat-77104g1 Firmware | <= tat-77104g1_20190107 |
| Tonnet | Tat-70432n Firmware | <= tat-77208g1_20181225 |
| Tonnet | Tat-71416g1 Firmware | <= tat-71416g1_20181225 |
| Tonnet | Tat-71832g1 Firmware | <= tat-71832g1_20190510 |
| Tonnet | Tat-76104g3 Firmware | <= 20181220_76104g3 |
| Tonnet | Tat-76108g3 Firmware | <= 20181221_76208g3 |
| Tonnet | Tat-76116g3 Firmware | <= 20181221_76216g3 |
| Tonnet | Tat-76132g3 Firmware | <= tat-70832g3_20181221-1 |
References
- https://tvn.twcert.org.tw/taiwanvn/TVN-201910003Third Party Advisory
- https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcfThird Party Advisory
- https://tvn.twcert.org.tw/taiwanvn/TVN-201910003Third Party Advisory
- https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcfThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-3923?
DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.
How severe is CVE-2020-3923?
CVE-2020-3923 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.68% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3923?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-3923?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST