Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow
Priority HIGH 81CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
An unauthenticated stack-based buffer overflow vulnerability exists in the HTTP API endpoint /cgi-bin/api.values.get. A remote attacker can leverage this vulnerability to achieve unauthenticated remote code execution (RCE) with root privileges on a target device. The vulnerability affects all six device models in the series: GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, and GXP1630.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.41721 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Grandstream | GXP1610 | up to 1.0.7.80 | — | No fix listed | CNA |
| Grandstream | GXP1615 | up to 1.0.7.80 | — | No fix listed | CNA |
| Grandstream | GXP1620 | up to 1.0.7.80 | — | No fix listed | CNA |
| Grandstream | GXP1625 | up to 1.0.7.80 | — | No fix listed | CNA |
| Grandstream | GXP1628 | up to 1.0.7.80 | — | No fix listed | CNA |
| Grandstream | GXP1630 | up to 1.0.7.80 | — | No fix listed | CNA |
- GXP1610 VendorGrandstream Affected up to 1.0.7.80 Fixed in — No fix listed CNA
- GXP1615 VendorGrandstream Affected up to 1.0.7.80 Fixed in — No fix listed CNA
- GXP1620 VendorGrandstream Affected up to 1.0.7.80 Fixed in — No fix listed CNA
- GXP1625 VendorGrandstream Affected up to 1.0.7.80 Fixed in — No fix listed CNA
- GXP1628 VendorGrandstream Affected up to 1.0.7.80 Fixed in — No fix listed CNA
- GXP1630 VendorGrandstream Affected up to 1.0.7.80 Fixed in — No fix listed CNA
CPE configurations NVD · 12
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:grandstream:gxp1610_firmware:*:*:*:*:*:*:*:* | before 1.0.7.81 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:gxp1610:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
| cpe:2.3:o:grandstream:gxp1615_firmware:*:*:*:*:*:*:*:* | before 1.0.7.81 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:gxp1615:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
| cpe:2.3:o:grandstream:gxp1620_firmware:*:*:*:*:*:*:*:* | before 1.0.7.81 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:gxp1620:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
| cpe:2.3:o:grandstream:gxp1625_firmware:*:*:*:*:*:*:*:* | before 1.0.7.81 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:gxp1625:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
| cpe:2.3:o:grandstream:gxp1628_firmware:*:*:*:*:*:*:*:* | before 1.0.7.81 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:gxp1628:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
- cpe:2.3:o:grandstream:gxp1610_firmware:*:*:*:*:*:*:*:* Versions before 1.0.7.81 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:gxp1610:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
- cpe:2.3:o:grandstream:gxp1615_firmware:*:*:*:*:*:*:*:* Versions before 1.0.7.81 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:gxp1615:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
- cpe:2.3:o:grandstream:gxp1620_firmware:*:*:*:*:*:*:*:* Versions before 1.0.7.81 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:gxp1620:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
- cpe:2.3:o:grandstream:gxp1625_firmware:*:*:*:*:*:*:*:* Versions before 1.0.7.81 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:gxp1625:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
- cpe:2.3:o:grandstream:gxp1628_firmware:*:*:*:*:*:*:*:* Versions before 1.0.7.81 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:gxp1628:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
Show 2 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:grandstream:gxp1630_firmware:*:*:*:*:*:*:*:* | before 1.0.7.81 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:gxp1630:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
- cpe:2.3:o:grandstream:gxp1630_firmware:*:*:*:*:*:*:*:* Versions before 1.0.7.81 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:gxp1630:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2329
- 2026-10-03 Alias added: GHSA-r4m3-cm43-fxrj
References
Advisory 2
More Grandstream Gxp1610 Firmware vulnerabilities
- TI-2020-04667 Code injection in Grandstream GXP1600 Series CVSS 3.1HIGH 8.8
- TI-2020-04666 Link following in Grandstream GXP1600 Series CVSS 3.1HIGH 8.8
- TI-2018-12511 Shell Metacharacter Injection in the SSH configuration interface on Grandstream GXP16xx… CVSS 3.0CRITICAL 9.8
- TI-2018-12510 A Malformed Input String to /cgi-bin/delete_CA on Grandstream GXP16xx VoIP 1.0.4.128… CVSS 3.0CRITICAL 9.8
- TI-2018-12509 A Malformed Input String to /cgi-bin/api-get_line_status on Grandstream GXP16xx VoIP… CVSS 3.0MEDIUM 5.3
Sources
- CVE-2026-2329 · CVE Program
- CVE-2026-2329 · NVD
- FIRST EPSS
- GHSA-r4m3-cm43-fxrj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences