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CVE-2026-2329

Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow

Public exploit available. Not confirmed exploited in the wild yet. Fixed in 1.0.7.81.

CVSS 3.19.8CriticalEPSS percentile99th42% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
Public exploit: 1 sourceFix1.0.7.81Upgrade to this build

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Grandstream Gxp1610 FirmwareAffected: < 1.0.7.81Upgrade to: 1.0.7.81Stated by: NVD
  • Grandstream Gxp1615 FirmwareAffected: < 1.0.7.81Upgrade to: 1.0.7.81Stated by: NVD
  • Grandstream Gxp1620 FirmwareAffected: < 1.0.7.81Upgrade to: 1.0.7.81Stated by: NVD
  • Grandstream Gxp1625 FirmwareAffected: < 1.0.7.81Upgrade to: 1.0.7.81Stated by: NVD
  • Grandstream Gxp1628 FirmwareAffected: < 1.0.7.81Upgrade to: 1.0.7.81Stated by: NVD

Versions as the sources state them. 7 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS99th
Public exploit
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

1 source with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

42% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 14 days before any public exploit.

  1. OpenVAS check added
  2. Public exploit / PoCsource: github-poc
  3. Patch availablerecord updated
  4. Publishedweakness classified, att&ck mapped

Affected products

And 4 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Scored 9.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 5 more references. See all after sign-in

In the news

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for GXP1610, not every advisory. This one: public exploit.