How severe is CVE-2010-4686?

CVE-2010-4686 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2010-4686 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4686?

CVE-2010-4686 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2010-4686?

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-2010-4686 published?

CVE-2010-4686 was published on 2011-01-07 and last updated on 2026-06-16.

CVE-2010-4686

CVE-2010-4686 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 7.8. 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-400.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Cisco Ios
Published: 2011-01-07
Last modified: 2026-06-16

Description

CallManager Express (CME) on Cisco IOS before 15.0(1)XA1 does not properly handle SIP TRUNK traffic that contains rate bursts and a "peculiar" request size, which allows remote attackers to cause a denial of service (memory consumption) by sending this traffic over a long duration, aka Bug ID CSCtb47950.

Frequently asked questions

What is CVE-2010-4686?: CallManager Express (CME) on Cisco IOS before 15.0(1)XA1 does not properly handle SIP TRUNK traffic that contains rate bursts and a "peculiar" request size, which allows remote attackers to cause a denial of service (memory consumption) by sending this traffic over a long duration, aka Bug ID CSCtb47950.
How severe is CVE-2010-4686?: CVE-2010-4686 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2010-4686 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4686?: CVE-2010-4686 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2010-4686?: 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-2010-4686 published?: CVE-2010-4686 was published on 2011-01-07 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*

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