CVE-2021-42913

The SyncThru Web Service on Samsung SCX-6x55X printers allows an attacker to gain access to a...

7.5 HighPublic exploit

The SyncThru Web Service on Samsung SCX-6x55X printers allows an attacker to gain access to a list of SMB users and cleartext passwords by reading the HTML source code. Authentication is not required.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.85%Down 1.1 points since Dec 21, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2021-42913
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-522
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-42913
Updated: 2026-11-02

EUVDEUVD-2021-29868 No score

Record: EUVD-2021-29868
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4jp6-449x-6fgh 7.5

The SyncThru Web Service on Samsung SCX-6x55X printers allows an attacker to gain access to a...

Record: GHSA-4jp6-449x-6fgh
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-922
Updated: 2026-11-02

Affected products

samsung syncthru web service

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	kernel-cyber/CVE-2021-42913	2021-12-21

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-42913 is a high vulnerability (CVSS 7.5) in Samsung Syncthru Web Service, published December 20, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.85%, the 79th percentile. No source names a fixed version.