CVE-2020-11618: THOMSON THT741FTA 2.2.1 and Philips DTR3502BFTA DVB-T2 2.2.1 set-top boxes have their TELNET service hardcoded

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HIGH 7.8MITIGATEMITIGATE

CVE-2020-11618 is a high-severity flaw (CVSS 7.8) affecting tht741fta firmware, dtr3502bfta dvb-t2 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

THOMSON THT741FTA 2.2.1 and Philips DTR3502BFTA DVB-T2 2.2.1 set-top boxes have their TELNET service hardcoded to start on boot, which allows an attacker on the local network to achieve root access via the TELNET protocol.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Published	2020-08-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: philips · thomsonstb

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-08-31 15:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

thomsonstb tht741fta firmware MITIGATE

Affected: 2.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

philips dtr3502bfta dvb-t2 firmware MITIGATE

Affected: 2.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-11618?

tht741fta firmware: mitigate or apply the listed mitigation; dtr3502bfta dvb-t2 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-11618 being exploited?

CVE-2020-11618 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-11618 affect?

CVE-2020-11618 affects tht741fta firmware, dtr3502bfta dvb-t2 firmware. Severity is high (CVSS 7.8). THOMSON THT741FTA 2.2.1 and Philips DTR3502BFTA DVB-T2 2.2.1 set-top boxes have their TELNET service hardcoded to start on boot, which allows an attacker on the local network to achieve root access via the TELNET protocol.

How urgent is CVE-2020-11618?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2020-11617 MEDIUM 5.9 MITIGATE MITIGATE The RSS application on THOMSON THT741FTA 2.2.1 and Philips DTR3502BFTA DVB-T2 2.2.1 set-top boxes doesn't vali

References

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