How severe is CVE-2022-4639?

CVE-2022-4639 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2022-4639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-4639?

CVE-2022-4639 affects Sslh Project Sslh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-4639?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-4639 published?

CVE-2022-4639 was published on 2022-12-21 and last updated on 2026-06-17.

CVE-2022-4639

CVE-2022-4639 is a medium-severity vulnerability in Sslh Project Sslh with a CVSS 3.x base score of 5.6. 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-134.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-134
Affected product: Sslh Project Sslh
Published: 2022-12-21
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, has been found in sslh. This issue affects the function hexdump of the file probe.c of the component Packet Dumping Handler. The manipulation of the argument msg_info leads to format string. The attack may be initiated remotely. The name of the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to apply a patch to fix this issue. The identifier VDB-216497 was assigned to this vulnerability.

Frequently asked questions

What is CVE-2022-4639?: A vulnerability, which was classified as critical, has been found in sslh. This issue affects the function hexdump of the file probe.c of the component Packet Dumping Handler. The manipulation of the argument msg_info leads to format string. The attack may be initiated remotely. The name of the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to apply a patch to fix this issue. The identifier VDB-216497 was assigned to this vulnerability.
How severe is CVE-2022-4639?: CVE-2022-4639 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2022-4639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-4639?: CVE-2022-4639 affects Sslh Project Sslh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-4639?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-4639 published?: CVE-2022-4639 was published on 2022-12-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sslh_project:sslh:2.0:rc1:*:*:*:*:*:*

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