How severe is CVE-2013-5526?

CVE-2013-5526 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2013-5526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5526?

CVE-2013-5526 primarily affects Cisco Unified Ip Phone 9951. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-5526?

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-2013-5526 published?

CVE-2013-5526 was published on 2013-10-10 and last updated on 2026-06-16.

CVE-2013-5526

CVE-2013-5526 is a high-severity vulnerability in Cisco Unified Ip Phone 9951 with a CVSS 2.0 base score of 7.1. 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 7.1)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Unified Ip Phone 9951
Published: 2013-10-10
Last modified: 2026-06-16

Description

Cisco 9900 fourth-generation IP phones do not properly perform SDP negotiation, which allows remote attackers to cause a denial of service (device reboot) via crafted SDP packets, aka Bug ID CSCuf06698.

Frequently asked questions

What is CVE-2013-5526?: Cisco 9900 fourth-generation IP phones do not properly perform SDP negotiation, which allows remote attackers to cause a denial of service (device reboot) via crafted SDP packets, aka Bug ID CSCuf06698.
How severe is CVE-2013-5526?: CVE-2013-5526 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2013-5526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-5526?: CVE-2013-5526 primarily affects Cisco Unified Ip Phone 9951. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-5526?: 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-2013-5526 published?: CVE-2013-5526 was published on 2013-10-10 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:h:cisco:unified_ip_phone_9951:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:unified_ip_phone_9971:*:*:*:*:*:*:*:*

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