CVE-2026-28634

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

In handleUssdRequest of PhoneInterfaceManager.java, there is a possible way to send a USSD request without permission due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 15, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

Android Security Bulletin—September 2026  |  Android Open Source Project

https://source.android.com/docs/security/bulletin/2026/2026-09-01

Vendor Advisories for CVE-2026-28634(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 19× in last 7d / 38× 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. 2026-09-19 17:54 UTCGHSA enrichment
  2. 2026-09-19 05:26 UTCGHSA enrichment
  3. 2026-09-18 16:59 UTCGHSA enrichment
  4. 2026-09-18 04:31 UTCEG score recompute
  5. 2026-09-18 04:31 UTCGHSA enrichment
  6. 2026-09-17 19:30 UTCEPSS rescore
  7. 2026-09-17 16:03 UTCGHSA enrichment
  8. 2026-09-17 03:35 UTCGHSA enrichment
  9. 2026-09-16 15:07 UTCEG score recompute
  10. 2026-09-16 15:07 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 02:39 UTCGHSA enrichment
  13. 2026-09-15 14:11 UTCGHSA enrichment
  14. 2026-09-15 07:34 UTCEG score recompute
  15. 2026-09-15 07:34 UTCGHSA enrichment
  16. 2026-09-14 19:06 UTCGHSA enrichment
  17. 2026-09-14 06:38 UTCGHSA enrichment
  18. 2026-09-13 18:11 UTCGHSA enrichment
  19. 2026-09-13 05:43 UTCGHSA enrichment
  20. 2026-09-12 17:16 UTCGHSA enrichment
  21. 2026-09-12 04:48 UTCGHSA enrichment
  22. 2026-09-11 16:21 UTCEG score recompute
  23. 2026-09-11 16:21 UTCGHSA enrichment
  24. 2026-09-11 14:52 UTCEPSS rescore
  25. 2026-09-11 03:53 UTCEG score recompute
Show 13 more
  1. 2026-09-11 03:53 UTCGHSA enrichment
  2. 2026-09-10 15:25 UTCGHSA enrichment
  3. 2026-09-10 14:45 UTCEG score recompute▲ 7.80
  4. 2026-09-10 14:45 UTCGHSA enrichment
  5. 2026-09-10 14:44 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  6. 2026-09-10 09:34 UTCEPSS rescore
  7. 2026-09-10 04:37 UTCGHSA enrichment
  8. 2026-09-10 04:33 UTCNVD update
  9. 2026-09-10 04:05 UTCGHSA enrichment
  10. 2026-09-10 04:00 UTCMITRE cvelistV5
  11. 2026-09-08 19:30 UTCNVD update
  12. 2026-09-08 18:31 UTCEG score recompute
  13. 2026-09-08 18:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-28634?
CVE-2026-28634 is a high vulnerability published on September 8, 2026. In handleUssdRequest of PhoneInterfaceManager.java, there is a possible way to send a USSD request without permission due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
When was CVE-2026-28634 disclosed?
CVE-2026-28634 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28634 actively exploited?
CVE-2026-28634 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 99.9% of all scored CVEs.
What is the CVSS score of CVE-2026-28634?
CVE-2026-28634 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28634?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28634, 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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