CVE-2026-2776 — CVE-2026-2776 | Sandbox escape due to incorrect boundary conditions in the Telemetry comp… — CVE & Security Advisory Radar

🎯 CVE-2026-2776 🇪🇺 EUVD

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CVE-2026-2776 | Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Klassifikation & Betroffenheit:

CWE-119 mozilla firefox *mozilla thunderbird *

Improper Restriction of Operations within the Bounds of a Memory Buffer 🎯 High

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

🛡️ Empfohlene Mitigation: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow prot…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-14 · Client-side Injection-induced Buffer Ove… (High) CAPEC-24 · Filter Failure through Buffer Overflow (High) CAPEC-42 · MIME Conversion (High) CAPEC-44 · Overflow Binary Resource File (Very High) CAPEC-45 · Buffer Overflow via Symbolic Links (High) CAPEC-100 · Overflow Buffers (Very High) CAPEC-123 · Buffer Manipulation (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-105285 10.0 CVE-2026-104610 10.0 CVE-2026-101039 10.0 CVE-2026-16367 10.0 CVE-2026-2778 10.0

🇩🇪 BSI-Sicherheitshinweise: BSI · mittel · Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht ↗ BSI · hoch · Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen ↗

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 02/2026

Heute 10.10.

CVSS-Vektor-Analyse: 10.0

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Verändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

Veröffentlicht:24.02.2026

Aktualisiert:15.07.2026 02:19

Assigner (CNA):mozilla

EUVD-ID:EUVD-2026-8498

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-119 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	CVEs	Anteil
≥90 %	720	0,2 %
≥50 %	3.223	0,9 %
≥10 %	22.115	6,0 %
<10 %	342.373	92,9 %

10.0 CRITICAL

EPSS

0.6%

CVE-2026-2776 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

Generic Security

CVE-2026-2776 | Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

CWE-119 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

24.02.2026

🛡️ Details ➔

CVE-2026-2776 | Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Noch keine Analyse zu CVE-2026-2776

Beitrag zu CVE-2026-2776 verfassen

Zero-Day & Vulnerability Intelligence Hub

CVE-2026-2776 | Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.