CVE-2026-76420 — CVE & Security Advisory Radar

🎯 CVE-2026-76420 🇪🇺 EUVD

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CVE-2026-76420 | A vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device. This vulnerability is due to incorrect initialization of encryption parameters for the AJP connector at boot time. An attacker could exploit this vulnerability by sending crafted packets to the AJP connector. A successful exploit could allow the attac

A vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device.

This vulnerability is due to incorrect initialization of encryption parameters for the AJP connector at boot time. An attacker could exploit this vulnerability by sending crafted packets to the AJP connector. A successful exploit could allow the attacker to execute commands as root and gain full control over the FMC REST APIs on the affected device.
Note: This vulnerability can be exploited only if the valid sftunnel connection between Cisco Secure FMC Software and Cisco Secure FTD Software is down.

Klassifikation & Betroffenheit:

Cisco Cisco Secure Firewall Management Center (FMC) 7.6.3Cisco Secure Firewall Management Center (FMC) 7.2.5.2Cisco Secure Firewall Management Center (FMC) 7.0.8.1Cisco Secure Firewall Management Center (FMC) 7.2.3.1Cisco Secure Firewall Management Center (FMC) 7.0.6.2Cisco Secure Firewall Management Center (FMC) 7.4.1Cisco Secure Firewall Management Center (FMC) 7.0.3Cisco Secure Firewall Management Center (FMC) 7.2.10.2

Improper Control of Generation of Code ('Code Injection') 🎯 Medium

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

🛡️ Empfohlene Mitigation: Refactor your program so that you do not have to dynamically generate code.

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-35 · Leverage Executable Code in Non-Executab… (Very High) CAPEC-77 · Manipulating User-Controlled Variables (Very High) CAPEC-242 · Code Injection (High)

🎯 ATT&CK-Techniken (Kill-Chain-Verhalten):

T1027.006 · Obfuscated Files or Information: H… T1027.009 · Obfuscated Files or Information: E… T1564.009 · Hide Artifacts: Resource Forking

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

CVE-2026-76460 10.0 CVE-2026-76423 10.0 CVE-2026-20130 10.0 CVE-2026-20192 10.0 CVE-2026-20315 10.0

📚 Referenzen & Quellen:

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

🔗 sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvi…

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 09/2026

Heute 17.09.

CVSS-Vektor-Analyse: 9.0

AV · Angriffsvektor Netzwerk

AC · Komplexität Hoch

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Verändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

Veröffentlicht:16.09.2026

Aktualisiert:16.09.2026 20:05

Assigner (CNA):cisco

EUVD-ID:EUVD-2026-80887

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Management-Interface vom Internet trennen und ACLs auf vertrauenswürdige IPs beschränken.

Tier	2026-08-29	2026-09-17
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

9.0 CRITICAL

🇪🇺 EUVD

EPSS

69.6%

CVE-2026-76420 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

Cisco

CVE-2026-76420 | A vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device. This vulnerability is due to incorrect initialization of encryption parameters for the AJP connector at boot time. An attacker could exploit this vulnerability by sending crafted packets to the AJP connector. A successful exploit could allow the attac

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Management-Interface vom Internet trennen und ACLs auf vertrauenswürdige IPs beschränken.

16.09.2026

🛡️ Details ➔

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