CVE-2015-6403

Severity: high (CVSS 7.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-12-15 · updated 2026-06-17
Weakness: CWE-20

Description

The TFTP implementation on Cisco Small Business SPA30x, SPA50x, SPA51x phones 7.5.7 improperly validates firmware-image file integrity, which allows local users to load a Trojan horse image by leveraging shell access, aka Bug ID CSCut67400.

Affected products

Cisco Spa300 Firmware: 7.5.7
Cisco Spa500 Firmware: 7.5.7

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-ipp
http://www.securityfocus.com/bid/78739
http://www.securitytracker.com/id/1034376
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151209-ipp
http://www.securityfocus.com/bid/78739
http://www.securitytracker.com/id/1034376

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