How severe is CVE-2013-1302?

CVE-2013-1302 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2013-1302 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-1302?

CVE-2013-1302 primarily affects Microsoft Lync. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-1302?

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-2013-1302 published?

CVE-2013-1302 was published on 2013-05-15 and last updated on 2026-06-16.

CVE-2013-1302

CVE-2013-1302 is a critical-severity vulnerability in Microsoft Lync with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Microsoft Lync
Published: 2013-05-15
Last modified: 2026-06-16

Description

Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 do not properly handle objects in memory, which allows remote attackers to execute arbitrary code via an invitation that triggers access to a deleted object, aka "Lync RCE Vulnerability."

Frequently asked questions

What is CVE-2013-1302?: Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 do not properly handle objects in memory, which allows remote attackers to execute arbitrary code via an invitation that triggers access to a deleted object, aka "Lync RCE Vulnerability."
How severe is CVE-2013-1302?: CVE-2013-1302 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2013-1302 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-1302?: CVE-2013-1302 primarily affects Microsoft Lync. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1302?: 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-2013-1302 published?: CVE-2013-1302 was published on 2013-05-15 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:microsoft:lync:2010:*:attendee:*:*:*:*:*
cpe:2.3:a:microsoft:lync:2010:*:x64:*:*:*:*:*
cpe:2.3:a:microsoft:lync:2010:*:x86:*:*:*:*:*
cpe:2.3:a:microsoft:lync_server:2013:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_communicator:2007:r2:*:*:*:*:*:*

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