How severe is CVE-2010-2840?

CVE-2010-2840 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2010-2840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-2840?

CVE-2010-2840 primarily affects Cisco Unified Presence Server. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-2840?

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-2010-2840 published?

CVE-2010-2840 was published on 2010-08-26 and last updated on 2026-06-16.

CVE-2010-2840

CVE-2010-2840 is a high-severity vulnerability in Cisco Unified Presence Server 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-20.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Unified Presence Server
Published: 2010-08-26
Last modified: 2026-06-16

Description

The Presence Engine (PE) service in Cisco Unified Presence 6.x before 6.0(7) and 7.x before 7.0(8) does not properly handle an erroneous Contact field in the header of a SIP SUBSCRIBE message, which allows remote attackers to cause a denial of service (process failure) via a malformed message, aka Bug ID CSCtd39629.

Frequently asked questions

What is CVE-2010-2840?: The Presence Engine (PE) service in Cisco Unified Presence 6.x before 6.0(7) and 7.x before 7.0(8) does not properly handle an erroneous Contact field in the header of a SIP SUBSCRIBE message, which allows remote attackers to cause a denial of service (process failure) via a malformed message, aka Bug ID CSCtd39629.
How severe is CVE-2010-2840?: CVE-2010-2840 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2010-2840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-2840?: CVE-2010-2840 primarily affects Cisco Unified Presence Server. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-2840?: 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-2010-2840 published?: CVE-2010-2840 was published on 2010-08-26 and last updated on 2026-06-16.

References

Affected products (22)

cpe:2.3:a:cisco:unified_presence_server:6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(4\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(6\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0\(4\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0\(5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0\(6\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0\(7\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(2.1101\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(3.1101-2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(4.1101-5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(5.1101-1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0\(5.1103-2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:6.0.5.1102-1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0.3.10102-3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0.3.10103-2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_presence_server:7.0.4.10101-2:*:*:*:*:*:*:*

More vulnerabilities in Cisco Unified Presence Server

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