How severe is CVE-2014-2522?

CVE-2014-2522 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2014-2522 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-2522?

CVE-2014-2522 primarily affects Haxx Curl. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-2522?

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

When was CVE-2014-2522 published?

CVE-2014-2522 was published on 2014-04-18 and last updated on 2026-06-17.

CVE-2014-2522

CVE-2014-2522 is a medium-severity vulnerability in Haxx Curl with a CVSS 2.0 base score of 4.0. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Haxx Curl
Published: 2014-04-18
Last modified: 2026-06-17

Description

curl and libcurl 7.27.0 through 7.35.0, when running on Windows and using the SChannel/Winssl TLS backend, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when accessing a URL that uses a numerical IP address, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

Frequently asked questions

What is CVE-2014-2522?: curl and libcurl 7.27.0 through 7.35.0, when running on Windows and using the SChannel/Winssl TLS backend, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when accessing a URL that uses a numerical IP address, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.
How severe is CVE-2014-2522?: CVE-2014-2522 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2014-2522 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-2522?: CVE-2014-2522 primarily affects Haxx Curl. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-2522?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-2522 published?: CVE-2014-2522 was published on 2014-04-18 and last updated on 2026-06-17.

References

Affected products (21)

cpe:2.3:a:haxx:curl:7.27.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.28.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.28.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.29.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.30.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.31.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.32.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.33.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.34.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:curl:7.35.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.27.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.28.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.28.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.29.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.30.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.31.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.32.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.33.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.34.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.35.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.36.0:*:*:*:*:*:*:*

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