How severe is CVE-2011-0651?

CVE-2011-0651 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2011-0651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0651?

CVE-2011-0651 affects Icon-labs Iconfidant Ssl Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-0651?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-0651 published?

CVE-2011-0651 was published on 2011-01-28 and last updated on 2026-06-16.

CVE-2011-0651

CVE-2011-0651 is a high-severity vulnerability in Icon-labs Iconfidant Ssl Server with a CVSS 2.0 base score of 7.5. 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-119.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Icon-labs Iconfidant Ssl Server
Published: 2011-01-28
Last modified: 2026-06-16

Description

Buffer overflow in the key exchange functionality in Icon Labs Iconfidant SSL Server before 1.3.0 allows remote attackers to execute arbitrary code via a client master key packet in which the sum of unspecified length fields is greater than a certain value.

Frequently asked questions

What is CVE-2011-0651?: Buffer overflow in the key exchange functionality in Icon Labs Iconfidant SSL Server before 1.3.0 allows remote attackers to execute arbitrary code via a client master key packet in which the sum of unspecified length fields is greater than a certain value.
How severe is CVE-2011-0651?: CVE-2011-0651 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-0651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0651?: CVE-2011-0651 affects Icon-labs Iconfidant Ssl Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-0651?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-0651 published?: CVE-2011-0651 was published on 2011-01-28 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:icon-labs:iconfidant_ssl_server:*:*:*:*:*:*:*:*

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →