CVE-2026-18634

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

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

An insecure handling of serialized objects vulnerability was found in the one of the service of GMS application 9.5.1 (Build 9510.1044) and earlier versions. A local attacker with the ability to interact with the service could exploit this behavior to perform unauthorized actions through the affected component.

CVSS v3
8.4
EG Score
8.4(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

Security Advisory

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011

Vendor Advisories for CVE-2026-18634(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 49× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 20:20 UTCGHSA enrichment
  3. 2026-08-20 08:13 UTCGHSA enrichment
  4. 2026-08-19 20:05 UTCEG score recompute
  5. 2026-08-19 20:05 UTCGHSA enrichment
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-19 07:57 UTCGHSA enrichment
  8. 2026-08-18 19:50 UTCGHSA enrichment
  9. 2026-08-18 07:44 UTCGHSA enrichment
  10. 2026-08-17 19:32 UTCEG score recompute
  11. 2026-08-17 19:32 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 07:24 UTCGHSA enrichment
  14. 2026-08-16 19:17 UTCEG score recompute
  15. 2026-08-16 19:17 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 07:09 UTCEG score recompute
  18. 2026-08-16 07:09 UTCGHSA enrichment
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-15 19:02 UTCGHSA enrichment
  21. 2026-08-15 06:55 UTCEG score recompute
  22. 2026-08-15 06:55 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 18:47 UTCGHSA enrichment
  25. 2026-08-14 06:40 UTCEG score recompute
Show 24 more
  1. 2026-08-14 06:40 UTCGHSA enrichment
  2. 2026-08-13 22:00 UTCEPSS rescore
  3. 2026-08-13 18:33 UTCGHSA enrichment
  4. 2026-08-13 06:26 UTCEG score recompute
  5. 2026-08-13 06:26 UTCGHSA enrichment
  6. 2026-08-12 18:19 UTCGHSA enrichment
  7. 2026-08-12 17:51 UTCEG score recompute▲ 8.40
  8. 2026-08-12 17:51 UTCGHSA enrichment
  9. 2026-08-12 17:50 UTCMITRE cvelistV5CVSS v3 → 8.4 · severity → HIGH
  10. 2026-08-12 15:13 UTCGHSA enrichment
  11. 2026-08-12 15:12 UTCMITRE cvelistV5
  12. 2026-08-12 14:23 UTCGHSA enrichment
  13. 2026-08-12 14:23 UTCNVD update
  14. 2026-08-12 13:59 UTCEG score recompute
  15. 2026-08-12 13:59 UTCGHSA enrichment
  16. 2026-08-12 13:58 UTCMITRE cvelistV5
  17. 2026-08-12 13:50 UTCEPSS rescore
  18. 2026-08-12 05:29 UTCGHSA enrichment
  19. 2026-08-12 05:29 UTCNVD update
  20. 2026-08-12 04:20 UTCGHSA enrichment
  21. 2026-08-12 04:19 UTCMITRE cvelistV5
  22. 2026-08-11 21:18 UTCNVD update
  23. 2026-08-11 20:30 UTCEG score recompute
  24. 2026-08-11 20:30 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18634?
CVE-2026-18634 is a high vulnerability published on August 11, 2026. An insecure handling of serialized objects vulnerability was found in the one of the service of GMS application 9.5.1 (Build 9510.1044) and earlier versions. A local attacker with the ability to interact with the service could exploit this behavior to perform unauthorized actions through the…
When was CVE-2026-18634 disclosed?
CVE-2026-18634 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18634 actively exploited?
CVE-2026-18634 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.0% of all scored CVEs.
What is the CVSS score of CVE-2026-18634?
CVE-2026-18634 has a CVSS v3.1 base score of 8.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-18634?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18634, 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

Explore the affected products and dependency analysis for CVE-2026-18634

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