Is CVE-2025-10966 in the CISA KEV catalog?

No. CVE-2025-10966 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-10966?

CVE-2025-10966 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2025-10966?

CVE-2025-10966 has an EPSS score of 0.39% (31th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-10966?

Upgrade curl on debian unstable to 8.17.0~rc2-1 or later.

CVE & CISA-KEV Catalog

CVE-2025-10966

MEDIUM

4.3

CVSS v3

NVD

Description

curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms. This prevents curl from detecting MITM attackers and more.

How to fix

Remediation Available

curlDebian

Fixed in:8.17.0~rc2-1CVE-2025-10966

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.39%probability of exploitation in 30 days

31stpercentile

Low risk: more likely to be exploited than 31% of all known CVEs.

References

Patch2

Exploit1

hackerone.com

Vendor Advisory1

curl.se

Other references1

cert-portal.siemens.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-02.