Cisco Secure Email Gateway Arbitrary File Write Vulnerability
CVSS score
9.8
EPSS probability
%1.6
Risk score
0.3
Published
4 d ago
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Impact on My Inventory
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
3
Source agreement
Tam uyum
Evidence confidence
%71
Short explanation
A critical vulnerability in the Advanced Malware Protection feature of Cisco Secure Email Gateway allows unauthenticated remote attackers to write arbitrary files. It is under active exploitation.
This flaw poses a severe risk as it enables attackers to execute commands with root privileges on the underlying operating system and is tracked in the CISA KEV catalog.
What should be done?
- Apply mitigations according to vendor instructions
- Follow CISA BOD 26-04 guidance
- Consult the vendor advisory for updates
Chain of evidence and sources
Cisco Secure Email Gateway üzerindeki bu açık, Advanced Malware Protection özelliğindeki ek işleme hatalarından kaynaklanır.
Başarılı bir istismar, saldırganın root yetkileriyle komut çalıştırmasını sağlayabilir ve açık CISA KEV listesindedir.
Show the technical text from the sources
A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-23
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-76519 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | cisco | Cisco Secure Email | View |
| 2 | cisco | asyncos | View |
| 3 | cisco | asyncos | View |
| 4 | cisco | secure email gateway virtual appliance c100v | View |
| 5 | cisco | secure email gateway virtual appliance c300v | View |
| 6 | cisco | secure email gateway virtual appliance c600v | View |
| 7 | cisco | secure email gateway c195 | View |
| 8 | cisco | secure email gateway c395 | View |
| 9 | cisco | secure email gateway c695 | View |
| 10 | cisco | Secure Email Gateway | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 9.8 | CVSS V31 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD |
| 9.8 | CVSS V3_1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
Resmî yama doğrulanamadı; geçici azaltım veya workaround mevcut.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Public exploit and active exploitation status
Verified exploit intelligence
CVE-2026-76519 : the database holds 1 public PoC/exploit sources for it. For direct links to the sources, open the Public Exploits tab.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-76519 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-76519 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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