CVE-2020-28055

Name: CVE-2020-28055
Creator: NVD / NIST
Published: 2020-11-10T18:15:12.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2020-28055 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability in the TCL Android Smart TV series V8-R851T02-LF1 V295 and below and V8-T658T01-LF1 V373 and below by TCL Technology Group Corporation allows a local unprivileged attacker, such as a malicious App, to read & write to the /data/vendor/tcl, /data/vendor/upgrade, and /var/TerminalManager directories within the TV file system. An attacker, such as a malicious APK or local unprivileged user could perform fake system upgrades by writing to the /data/vendor/upgrage folder.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

A vulnerability in the TCL Android Smart TV series V8-R851T02-LF1 V295 and below and V8-T658T01-LF1 V373 and below by TCL Technology Group Corporation allows a local unprivileged attacker, such as a malicious App, to read & write to the /data/vendor/tcl, /data/vendor/upgrade, and /var/TerminalManager directories within the TV file system. An attacker, such as a malicious APK or local unprivileged user could perform fake system upgrades by writing to the /data/vendor/upgrage folder.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.50%

39.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions
Tcl	32s330 Firmware	< v8-r851t10-lf1v091
Tcl	40s330 Firmware	< v8-r851t10-lf1v091
Tcl	43s434 Firmware	< v8-r851t02-lf1v440
Tcl	50s434 Firmware	< v8-r851t02-lf1v440
Tcl	55s434 Firmware	< v8-r851t02-lf1v440
Tcl	65s434 Firmware	< v8-r851t02-lf1v440
Tcl	75s434 Firmware	< v8-r851t02-lf1v440

References

https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-012.mdExploit, Third Party Advisory
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_GlobalFAQ.pdfThird Party Advisory
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_Press-Statement-and-Questions_11162020.pdfThird Party Advisory
https://securityledger.com/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/Third Party Advisory
https://securityledger.com/2020/11/tv-maker-tcl-denies-back-door-promises-better-process/Third Party Advisory
https://sick.codes/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/Exploit, Third Party Advisory
https://sick.codes/sick-2020-012Exploit, Third Party Advisory
https://support.tcl.com/vulnerabilities-found-in-tcl-android-tvsVendor Advisory
https://twitter.com/johnjhacking/Third Party Advisory
https://twitter.com/sickcodes/Third Party Advisory
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-012.mdExploit, Third Party Advisory
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_GlobalFAQ.pdfThird Party Advisory
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_Press-Statement-and-Questions_11162020.pdfThird Party Advisory
https://securityledger.com/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/Third Party Advisory
https://securityledger.com/2020/11/tv-maker-tcl-denies-back-door-promises-better-process/Third Party Advisory
https://sick.codes/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/Exploit, Third Party Advisory
https://sick.codes/sick-2020-012Exploit, Third Party Advisory
https://support.tcl.com/vulnerabilities-found-in-tcl-android-tvsVendor Advisory
https://twitter.com/johnjhacking/Third Party Advisory
https://twitter.com/sickcodes/Third Party Advisory

Timeline

Published: Nov 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28055?

How severe is CVE-2020-28055?

CVE-2020-28055 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28055?

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.

Are you affected by CVE-2020-28055?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST