CVE-2026-2329

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-02-18. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, ssvc poc, epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 41%CVSS: 9.8Exploit: Metasploit · ssvc poc · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
85(Attend)
EG Risk 85/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation65% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
41%
EPSS %ILE
99%
KEV
Not listed

Published

February 18, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Sep 21, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

CVE-2026-2329: Critical Unauthenticated Stack Buffer Overflow in Grandstream GXP1600 VoIP Phones (FIXED)

https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixed
generic

Vulnerability

https://psirt.grandstream.com/
github_pr

Add exploit (CVE-2026-2329) and auxiliary modules for the Grandstream GXP1600 series

Fix merged in rapid7/metasploit-framework PR #20983 on 2026-02-24 — awaiting tagged release

https://github.com/rapid7/metasploit-framework/pull/20983
generic
https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdf

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-12 15:01 UTCEPSS rescore
  7. 2026-09-11 14:52 UTCEPSS rescore
  8. 2026-09-10 09:34 UTCEPSS rescore
  9. 2026-09-06 13:47 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:11 UTCEPSS rescore
  13. 2026-09-01 04:39 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:46 UTCEPSS rescore
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-24 14:17 UTCEPSS rescore
  22. 2026-08-21 23:49 UTCEPSS rescore
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-19 17:03 UTCEPSS rescore
Show 44 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 02:14 UTCEPSS rescore
  5. 2026-08-15 01:48 UTCEG score recompute
  6. 2026-08-15 01:48 UTCGHSA enrichment
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 21:57 UTCGHSA enrichment
  9. 2026-08-14 13:39 UTCGHSA enrichment
  10. 2026-08-14 09:51 UTCEG score recompute
  11. 2026-08-14 09:51 UTCGHSA enrichment
  12. 2026-08-13 22:00 UTCEPSS rescore
  13. 2026-08-13 02:10 UTCEG score recompute
  14. 2026-08-13 02:10 UTCGHSA enrichment
  15. 2026-08-12 13:50 UTCEPSS rescore
  16. 2026-08-11 13:42 UTCEPSS rescore
  17. 2026-08-11 07:32 UTCEG score recompute
  18. 2026-08-11 07:32 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 09:41 UTCGHSA enrichment
  21. 2026-08-10 01:37 UTCGHSA enrichment
  22. 2026-08-09 21:49 UTCGHSA enrichment
  23. 2026-08-09 18:01 UTCGHSA enrichment
  24. 2026-08-09 14:13 UTCGHSA enrichment
  25. 2026-08-08 09:11 UTCGHSA enrichment
  26. 2026-08-08 05:23 UTCGHSA enrichment
  27. 2026-08-08 01:31 UTCGHSA enrichment
  28. 2026-08-07 21:43 UTCEG score recompute
  29. 2026-08-07 21:43 UTCGHSA enrichment
  30. 2026-08-06 13:46 UTCEPSS rescore
  31. 2026-08-06 07:24 UTCGHSA enrichment
  32. 2026-08-06 03:36 UTCEG score recompute
  33. 2026-08-06 03:36 UTCGHSA enrichment
  34. 2026-08-04 15:10 UTCEPSS rescore
  35. 2026-08-03 10:36 UTCEPSS rescore
  36. 2026-08-03 01:35 UTCGHSA enrichment
  37. 2026-08-02 20:23 UTCEG score recompute
  38. 2026-08-02 20:23 UTCGHSA enrichment
  39. 2026-08-01 04:16 UTCEPSS rescore
  40. 2026-07-30 16:27 UTCEPSS rescore
  41. 2026-07-30 01:30 UTCEPSS rescore
  42. 2026-07-28 15:36 UTCEPSS rescore
  43. 2026-07-27 12:55 UTCEG score recompute
  44. 2026-07-27 12:55 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/linux/http/grandstream_gxp1600_unauth_rce✓ verified
    First seen Feb 18, 2026

    GrandStream GXP1600 Unauthenticated Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-2329?
CVE-2026-2329 is a critical vulnerability published on February 18, 2026. 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…
When was CVE-2026-2329 disclosed?
CVE-2026-2329 was first published in the National Vulnerability Database on February 18, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2329 actively exploited?
CVE-2026-2329 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 41% probability of exploitation in the next 30 days, which ranks it in the top 1.4% of all scored CVEs.
What is the CVSS score of CVE-2026-2329?
CVE-2026-2329 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-2329?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2329, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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