CVE-2020-16134

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, thus allowing a login session as the superuser.

Published: 2020-08-04 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-16134 is rated Moderate Risk (42.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.13%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-16134

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.22% 0.13% -0.09%
2 2025-03-29 0.13% 0.22% +0.09%
3 2025-03-17 — 0.13% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-16134

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.0 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.1 5.9 [email protected]
7.7 2.0 HIGH
AV:A/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 5.1 10.0 [email protected]

Weakness enumeration for CVE-2020-16134

Affected software / configurations for CVE-2020-16134

Vendor Product Version Raw CPE
swisscom internet-box_2_firmware < 10.04.38 cpe:2.3:o:swisscom:internet-box_2_firmware:*:*:*:*:*:*:*:*
swisscom internet-box_standard_firmware < 10.04.38 cpe:2.3:o:swisscom:internet-box_standard_firmware:*:*:*:*:*:*:*:*
swisscom internet-box_plus_firmware < 10.04.38 cpe:2.3:o:swisscom:internet-box_plus_firmware:*:*:*:*:*:*:*:*
swisscom internet-box_3_firmware < 11.01.20 cpe:2.3:o:swisscom:internet-box_3_firmware:*:*:*:*:*:*:*:*
swisscom internet-box_light_firmware < 08.06.06 cpe:2.3:o:swisscom:internet-box_light_firmware:*:*:*:*:*:*:*:*

References for CVE-2020-16134

cvelogic Threat Intelligence