CVE-2026-2329 (GCVE-0-2026-2329)
Vulnerability from cvelistv5 – Published: 2026-02-18 14:08 – Updated: 2026-02-18 14:50
VLAI
EPSS
VEX
Title
Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-18 14:50 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.rapid7.com/blog/post/ve-cve-2026-2329… | third-party-advisory |
| https://psirt.grandstream.com/ | vendor-advisory |
| https://firmware.grandstream.com/Release_Note_GXP… | release-notes |
| https://github.com/rapid7/metasploit-framework/pu… | exploit |
Impacted products
6 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Grandstream | GXP1610 |
Affected:
0 , ≤ 1.0.7.80
(semver)
|
guessed | |
| Grandstream | GXP1615 |
Affected:
0 , ≤ 1.0.7.80
(semver)
|
guessed | |
| Grandstream | GXP1620 |
Affected:
0 , ≤ 1.0.7.80
(semver)
|
guessed | |
| Grandstream | GXP1625 |
Affected:
0 , ≤ 1.0.7.80
(semver)
|
guessed | |
| Grandstream | GXP1628 |
Affected:
0 , ≤ 1.0.7.80
(semver)
|
guessed | |
| Grandstream | GXP1630 |
Affected:
0 , ≤ 1.0.7.80
(semver)
|
guessed |
Date Public
2026-02-18 14:00
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"product": "GXP1630",
"vendor": "Grandstream",
"versions": [
{
"lessThanOrEqual": "1.0.7.80",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Stephen Fewer, Senior Principal Security Researcher at Rapid7"
}
],
"datePublic": "2026-02-18T14:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "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.\u003cbr\u003e"
}
],
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-121",
"description": "CWE-121 Stack-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-18T14:08:09.272Z",
"orgId": "9974b330-7714-4307-a722-5648477acda7",
"shortName": "rapid7"
},
"references": [
{
"tags": [
"third-party-advisory"
],
"url": "https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixed"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://psirt.grandstream.com/"
},
{
"tags": [
"release-notes"
],
"url": "https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdf"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/rapid7/metasploit-framework/pull/20983"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "9974b330-7714-4307-a722-5648477acda7",
"assignerShortName": "rapid7",
"cveId": "CVE-2026-2329",
"datePublished": "2026-02-18T14:08:09.272Z",
"dateReserved": "2026-02-11T09:26:52.179Z",
"dateUpdated": "2026-02-18T14:50:51.252Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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