How severe is CVE-2017-12260?

CVE-2017-12260 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-12260 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12260?

CVE-2017-12260 primarily affects Cisco Spa 501g Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-12260?

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-2017-12260 published?

CVE-2017-12260 was published on 2017-10-19 and last updated on 2026-06-17.

CVE-2017-12260

CVE-2017-12260 is a high-severity vulnerability in Cisco Spa 501g Firmware with a CVSS 3.x base score of 7.5. 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Spa 501g Firmware
Published: 2017-10-19
Last modified: 2026-06-17

Description

A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of SIP request messages by an affected device. An attacker could exploit this vulnerability by using formatted specifiers in a SIP payload that is sent to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. This vulnerability affects Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones that are running firmware release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63986.

Frequently asked questions

What is CVE-2017-12260?: A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of SIP request messages by an affected device. An attacker could exploit this vulnerability by using formatted specifiers in a SIP payload that is sent to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. This vulnerability affects Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones that are running firmware release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63986.
How severe is CVE-2017-12260?: CVE-2017-12260 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-12260 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12260?: CVE-2017-12260 primarily affects Cisco Spa 501g Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-12260?: 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-2017-12260 published?: CVE-2017-12260 was published on 2017-10-19 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:cisco:spa_501g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_502g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_504g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_508g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_509g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_512g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_514g_firmware:*:sr1:*:*:*:*:*:*
cpe:2.3:o:cisco:spa_525g_firmware:*:sr1:*:*:*:*:*:*

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