The TFTP implementation on Cisco Small Business SPA30x, SPA50x, SPA51x phones 7.5.7…
Priority LOW 32CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.0038 32nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 14
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:spa500_firmware:7.5.7:*:*:*:*:*:*:* | 7.5.7 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:spa_500ds:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_501g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_502g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_504g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_508g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_509g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_512g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_514g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:spa500_firmware:7.5.7:*:*:*:*:*:*:* Versions 7.5.7 Vulnerable ·Cisco
- cpe:2.3:h:cisco:spa_500ds:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_501g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_502g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_504g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_508g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_509g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_512g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_514g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 4 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:cisco:spa_525g2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:spa300_firmware:7.5.7:*:*:*:*:*:*:* | 7.5.7 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:spa_301:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:spa_303:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:h:cisco:spa_525g2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:spa300_firmware:7.5.7:*:*:*:*:*:*:* Versions 7.5.7 Vulnerable ·Cisco
- cpe:2.3:h:cisco:spa_301:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:spa_303:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-6403
- 2026-10-03 Alias added: GHSA-9rwf-hg9h-2rpm
References
More Cisco Spa300 Firmware vulnerabilities
- TI-2017-09047 Cross-site request forgery in Cisco SPA300 and SPA500 Series IP Phones CVSS 3.1HIGH 8.8
- TI-2016-01357 The HTTP framework on Cisco SPA300, SPA500, and SPA51x devices allows remote attackers to… CVSS 3.1HIGH 7.5
- TI-2015-00621 The default configuration of Cisco Small Business IP phones SPA 300 7.5.5 and SPA 500… CVSS 2.0MEDIUM 6.4
Sources
- CVE-2015-6403 · CVE Program
- CVE-2015-6403 · NVD
- FIRST EPSS
- GHSA-9rwf-hg9h-2rpm · GitHub Advisory Database · CC BY 4.0
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