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CVE-2022-4639

30
FAUCET Score

CVE-2022-4639 is a critical format string vulnerability in the sslh_project sslh, specifically within the hexdump function of the Packet Dumping Handler component. This flaw allows for remote exploitation, potentially leading to a complete compromise of confidentiality, integrity, and availability, as indicated by its CVSS score of 9.8. Despite its high severity and ease of exploitation (AV:N/AC:L/PR:N/UI:N), there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. A patch (b19f8a6046b080e4c2e28354a58556bb26040c6f) is available to address this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:sslh_project:sslh:2.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 39th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / yrutschle/sslh/commit/b19f8a6046b080e4c2e28354a58556bb26040c6f
PatchThird Party Advisory
github.com / yrutschle/sslh/pull/353
PatchThird Party Advisory
vuldb.com
Third Party Advisory