How severe is CVE-2021-42913?

CVE-2021-42913 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-42913 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42913?

CVE-2021-42913 affects Samsung Syncthru Web Service. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42913?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-42913 published?

CVE-2021-42913 was published on 2021-12-20 and last updated on 2026-06-17.

CVE-2021-42913

CVE-2021-42913 is a high-severity vulnerability in Samsung Syncthru Web Service with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Samsung Syncthru Web Service
Published: 2021-12-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-42913?: 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.
How severe is CVE-2021-42913?: CVE-2021-42913 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-42913 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42913?: CVE-2021-42913 affects Samsung Syncthru Web Service. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42913?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-42913 published?: CVE-2021-42913 was published on 2021-12-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:samsung:syncthru_web_service:-:*:*:*:*:*:*:*

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