CVE-2020-28055 json
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…
published 2020-11-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20543
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- 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
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- sick.codes https://sick.codes/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/ referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-012.md referenced PoC, tagged "exploit" by a source, unverified
- sick.codes https://sick.codes/sick-2020-012 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-732 Incorrect Permission Assignment for Critical Resource
References
-
sick.codes
/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/
exploit, third-party-advisory
-
github.com
/sickcodes/security/blob/master/advisories/SICK-2020-012.md
exploit, third-party-advisory
-
sick.codes
/sick-2020-012
exploit, third-party-advisory
-
support.tcl.com
/vulnerabilities-found-in-tcl-android-tvs
vendor-advisory
-
twitter.com
/sickcodes/
third-party-advisory
-
twitter.com
/johnjhacking/
third-party-advisory
-
github.com
/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_Press-Statement-and-Questions_11162020.pdf
third-party-advisory
-
github.com
/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_GlobalFAQ.pdf
third-party-advisory
-
securityledger.com
/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/
third-party-advisory
-
securityledger.com
/2020/11/tv-maker-tcl-denies-back-door-promises-better-process/
third-party-advisory
Sources
- CVE List CVE-2020-28055
- NVD CVE-2020-28055
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