CVE-2026-76519
CRITICALCISA KEVEPSS 75th pctlDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 75% of all known CVEs.
Remediation due: 2026-10-17
References
Related Vulnerabilities
Other CWE-23 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-27199 | High | 7.3 | 100% | KEV + Ransom | Fix |
| CVE-2020-5410 | High | 7.5 | 96% | KEV | Fix |
| CVE-2021-40870 | Critical | 9.8 | 93% | KEV | Fix |
| CVE-2025-64446 | Critical | 9.8 | 92% | KEV | Fix |
| CVE-2020-5405 | Medium | 6.5 | 69% | - | Fix |
| CVE-2025-55752 | High | 7.5 | 64% | - | Fix |
Common questions
How do I fix CVE-2026-76519?
Upgrade asyncos to 16.5.0-780 or later.
Is CVE-2026-76519 being actively exploited?
Yes. CVE-2026-76519 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2026-10-17. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2026-76519?
CVE-2026-76519 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-76519 affect?
Published advisories record a fix for asyncos (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-76519
Markdown
[](https://tridentstack.com/cve/CVE-2026-76519)HTML
<a href="https://tridentstack.com/cve/CVE-2026-76519"><img src="https://tridentstack.com/cve/badge/CVE-2026-76519.svg" alt="CVE-2026-76519"></a>This vulnerability is actively exploited in the wild
TridentStack Control detects known-exploited CVEs across your Windows, macOS, and Linux fleet and prioritizes their patches. 200 endpoints free forever.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-15.