How severe is CVE-2011-2543?

CVE-2011-2543 has a CVSS 2.0 base score of 9.0, rated critical severity.

Is CVE-2011-2543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2543?

CVE-2011-2543 primarily affects Cisco Telepresence Codec C40. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2543?

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

When was CVE-2011-2543 published?

CVE-2011-2543 was published on 2011-09-23 and last updated on 2026-06-16.

CVE-2011-2543

CVE-2011-2543 is a critical-severity vulnerability in Cisco Telepresence Codec C40 with a CVSS 2.0 base score of 9.0. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.0)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Telepresence Codec C40
Published: 2011-09-23
Last modified: 2026-06-16

Description

Buffer overflow in the cuil component in Cisco Telepresence System Integrator C Series 4.x before TC4.2.0 allows remote authenticated users to cause a denial of service (endpoint reboot or process crash) or possibly execute arbitrary code via a long location parameter to the getxml program, aka Bug ID CSCtq46496.

Frequently asked questions

What is CVE-2011-2543?: Buffer overflow in the cuil component in Cisco Telepresence System Integrator C Series 4.x before TC4.2.0 allows remote authenticated users to cause a denial of service (endpoint reboot or process crash) or possibly execute arbitrary code via a long location parameter to the getxml program, aka Bug ID CSCtq46496.
How severe is CVE-2011-2543?: CVE-2011-2543 has a CVSS 2.0 base score of 9.0, rated critical severity.
Is CVE-2011-2543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2543?: CVE-2011-2543 primarily affects Cisco Telepresence Codec C40. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-2543 published?: CVE-2011-2543 was published on 2011-09-23 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:h:cisco:telepresence_codec_c40:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:telepresence_codec_c60:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:telepresence_codec_c90:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:telepresence_c_series_software:tc4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:telepresence_c_series_software:tc4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:telepresence_c_series_software:tc4.0.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:telepresence_c_series_software:tc4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:telepresence_c_series_software:tc4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:telepresence_c_series_software:tc4.1.2:*:*:*:*:*:*:*

More vulnerabilities in Cisco Telepresence Codec C40

CVE-2013-3377 — High (CVSS 7.8): Cisco TelePresence TC Software before 5.1.7 and TE Software before 4.1.3 allow remote attackers to cause a denial of…
CVE-2011-2577 — High (CVSS 7.8): Unspecified vulnerability in Cisco TelePresence C Series Endpoints, E/EX Personal Video units, and MXP Series Codecs,…

All CVEs affecting Cisco Telepresence Codec C40 →

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 →