CVE-2020-16134: An issue was discovered on Swisscom Internet Box 2, Internet Box Standard, Internet Box Plus prior to 10.04.38

Q: How do I fix CVE-2020-16134?

internet-box 2 firmware: upgrade to 10.04.38; internet-box standard firmware: upgrade to 10.04.38; internet-box plus firmware: upgrade to 10.04.38. Exact commands for each OS are on this page.

Q: Is CVE-2020-16134 being exploited?

CVE-2020-16134 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-16134 affect?

CVE-2020-16134 affects internet-box 2 firmware, internet-box standard firmware, internet-box plus firmware. Severity is high (CVSS 8.0). An issue was discovered on Swisscom Internet Box 2, Internet Box Standard, Internet Box Plus prior to 10.04.38, Internet Box 3 prior to 11.01.20, and Internet Box light prior to 08.06.06. Given the (user-configurable) credentials for the lo

This month

HIGH 8.0UPGRADEUPGRADEUPGRADE

CVE-2020-16134 is a high-severity flaw (CVSS 8.0) affecting internet-box 2 firmware, internet-box standard firmware, internet-box plus firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on Swisscom Internet Box 2, Internet Box Standard, Internet Box Plus prior to 10.04.38, Internet Box 3 prior to 11.01.20, and Internet Box light prior to 08.06.06. Given the (user-configurable) credentials for the local Web interface or physical access to a device's plus or reset button, an attacker can create a user with elevated privileges on the Sysbus-API. This can then be used to modify local or remote SSH access, thu

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Published	2020-08-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: swisscom

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

Am I affected?

Timeline

2020-08-04 19:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

swisscom internet-box 2 firmware UPGRADE

Affected: < 10.04.38

Fixed in: 10.04.38

Safe to downgrade to: no unaffected older release

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.

swisscom internet-box standard firmware UPGRADE

Affected: < 10.04.38

Fixed in: 10.04.38

Safe to downgrade to: no unaffected older release

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.

swisscom internet-box plus firmware UPGRADE

Affected: < 10.04.38

Fixed in: 10.04.38

Safe to downgrade to: no unaffected older release

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.

swisscom internet-box 3 firmware UPGRADE

Affected: < 11.01.20

Fixed in: 11.01.20

Safe to downgrade to: no unaffected older release

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.

swisscom internet-box light firmware UPGRADE

Affected: < 08.06.06

Fixed in: 08.06.06

Safe to downgrade to: no unaffected older release

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-2020-16134?

internet-box 2 firmware: upgrade to 10.04.38; internet-box standard firmware: upgrade to 10.04.38; internet-box plus firmware: upgrade to 10.04.38. Exact commands for each OS are on this page.

Is CVE-2020-16134 being exploited?

CVE-2020-16134 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-2020-16134 affect?

CVE-2020-16134 affects internet-box 2 firmware, internet-box standard firmware, internet-box plus firmware. Severity is high (CVSS 8.0). An issue was discovered on Swisscom Internet Box 2, Internet Box Standard, Internet Box Plus prior to 10.04.38, Internet Box 3 prior to 11.01.20, and Internet Box light prior to 08.06.06. Given the (user-configurable) credentials for the lo

How urgent is CVE-2020-16134?

Priority 42/100. High severity

Related CVEs

CVE-2018-16596 HIGH 7.5 UPGRADE UPGRADE A stack-based buffer overflow in the LAN UPnP service running on UDP port 1900 of Swisscom Internet-Box (2, St

References

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