CVE-2026-76519Critical· 9.8▾ Hadal⚠ Exploited in the wild0dayPoC availableA 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 i…
▾ Hadal zone — Critical and actively exploited (CISA KEV / 0day)
impact 53.9 · likelihood 0.4 · exploitation 25
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Federal remediation due Oct 17, 2026
Last analysed / modified upstream
1 GitHub repo
1.6%
1.6% → 2.2%
Added to the CISA catalog on Oct 14, 2026. Federal remediation due Oct 17, 2026. View catalog ↗
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.
asyncos >= 15.0, < 15.5.5-014asyncos >= 16.0, < 16.5.0-780Upgrade past the affected range:
asyncos 16.5.0-780Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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