How severe is CVE-2010-3901?

CVE-2010-3901 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2010-3901 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-3901?

CVE-2010-3901 primarily affects Infradead Openconnect. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-3901?

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

When was CVE-2010-3901 published?

CVE-2010-3901 was published on 2010-10-14 and last updated on 2026-06-16.

CVE-2010-3901

CVE-2010-3901 is a medium-severity vulnerability in Infradead Openconnect with a CVSS 2.0 base score of 6.4. 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 6.4)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Infradead Openconnect
Published: 2010-10-14
Last modified: 2026-06-16

Description

OpenConnect before 2.25 does not properly validate X.509 certificates, which allows man-in-the-middle attackers to spoof arbitrary AnyConnect SSL VPN servers via a crafted server certificate that (1) does not correspond to the server hostname or (2) is presented in circumstances involving a missing --cafile configuration option.

Frequently asked questions

What is CVE-2010-3901?: OpenConnect before 2.25 does not properly validate X.509 certificates, which allows man-in-the-middle attackers to spoof arbitrary AnyConnect SSL VPN servers via a crafted server certificate that (1) does not correspond to the server hostname or (2) is presented in circumstances involving a missing --cafile configuration option.
How severe is CVE-2010-3901?: CVE-2010-3901 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2010-3901 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-3901?: CVE-2010-3901 primarily affects Infradead Openconnect. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-3901?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-3901 published?: CVE-2010-3901 was published on 2010-10-14 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:infradead:openconnect:*:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.00:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.10:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.20:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.30:*:*:*:*:*:*:*

More vulnerabilities in Infradead Openconnect

CVE-2020-12823 — Critical (CVSS 9.8): OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other…
CVE-2013-7098 — Critical (CVSS 9.8): OpenConnect VPN client with GnuTLS before 5.02 contains a heap overflow if MTU is increased on reconnection.
CVE-2019-16239 — Critical (CVSS 9.8): process_http_response in OpenConnect before 8.05 has a Buffer Overflow when a malicious server uses HTTP chunked…
CVE-2012-3291 — High (CVSS 7.8): Heap-based buffer overflow in OpenConnect 3.18 allows remote servers to cause a denial of service via a crafted…
CVE-2020-12105 — Medium (CVSS 5.9): OpenConnect through 8.08 mishandles negative return values from X509_check_ function calls, which might assist…
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