How severe is CVE-2015-0670?

CVE-2015-0670 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2015-0670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-0670?

CVE-2015-0670 primarily affects Cisco Spa500 Firmware. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-0670?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-0670 published?

CVE-2015-0670 was published on 2015-03-21 and last updated on 2026-06-17.

CVE-2015-0670

CVE-2015-0670 is a medium-severity vulnerability in Cisco Spa500 Firmware with a CVSS 2.0 base score of 6.4. 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Cisco Spa500 Firmware
Published: 2015-03-21
Last modified: 2026-06-17

Description

The default configuration of Cisco Small Business IP phones SPA 300 7.5.5 and SPA 500 7.5.5 does not properly support authentication, which allows remote attackers to read audio-stream data or originate telephone calls via a crafted XML request, aka Bug ID CSCuo52482.

Frequently asked questions

What is CVE-2015-0670?: The default configuration of Cisco Small Business IP phones SPA 300 7.5.5 and SPA 500 7.5.5 does not properly support authentication, which allows remote attackers to read audio-stream data or originate telephone calls via a crafted XML request, aka Bug ID CSCuo52482.
How severe is CVE-2015-0670?: CVE-2015-0670 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2015-0670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-0670?: CVE-2015-0670 primarily affects Cisco Spa500 Firmware. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-0670?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-0670 published?: CVE-2015-0670 was published on 2015-03-21 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:o:cisco:spa500_firmware:7.5.5:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_501g_8-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_502g_1-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_504g_4-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_508g_8-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_509g_12-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_512g_1-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_514g_4-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_525g_5-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_525g2_5-line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa300_firmware:7.5.5:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_301_1_line_ip_phone:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_302d:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_302dkit:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:spa_303_3_line_ip_phone:*:*:*:*:*:*:*:*

More vulnerabilities in Cisco Spa500 Firmware

CVE-2017-12271 — High (CVSS 8.8): A vulnerability in Cisco SPA300 and SPA500 Series IP Phones could allow an unauthenticated, remote attacker to execute…
CVE-2016-1469 — High (CVSS 7.5): The HTTP framework on Cisco SPA300, SPA500, and SPA51x devices allows remote attackers to cause a denial of service…
CVE-2019-1683 — High (CVSS 7.4): A vulnerability in the certificate handling component of the Cisco SPA112, SPA525, and SPA5X5 Series IP Phones could…
CVE-2015-6403 — High (CVSS 7.2): The TFTP implementation on Cisco Small Business SPA30x, SPA50x, SPA51x phones 7.5.7 improperly validates firmware-image…

All CVEs affecting Cisco Spa500 Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →