CVE-2025-20393 KEV
10.0
CRITICAL · CVSS 3.1 · EPSS 32.4% (pctl 98)
Patch first
On CISA KEV — known exploited in the wild, due 2025-12-24.
Description
A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges. This vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with root privileges.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 32.39% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-20 |
| On CISA KEV | yes — remediate by 2025-12-24 |
| Public exploit | none known |
| Published | 2025-12-17 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Cisco Multiple Products Improper Input Validation Vulnerability |
|---|---|
| Added | 2025-12-17 |
| Due | 2025-12-24 |
| Vendor / product | Cisco / Multiple Products |
| Ransomware use | none reported |
Affected (21)
| Vendor | Product |
|---|---|
| cisco | asyncos |
| cisco | secure email and web manager m170 |
| cisco | secure email and web manager m190 |
| cisco | secure email and web manager m195 |
| cisco | secure email and web manager m380 |
| cisco | secure email and web manager m390 |
| cisco | secure email and web manager m390x |
| cisco | secure email and web manager m395 |
| cisco | secure email and web manager m680 |
| cisco | secure email and web manager m690 |
| cisco | secure email and web manager m690x |
| cisco | secure email and web manager m695 |
| cisco | secure email and web manager virtual appliance m100v |
| cisco | secure email and web manager virtual appliance m300v |
| cisco | secure email and web manager virtual appliance m600v |
| cisco | secure email gateway c195 |
| cisco | secure email gateway c395 |
| cisco | secure email gateway c695 |
| cisco | secure email gateway virtual appliance c100v |
| cisco | secure email gateway virtual appliance c300v |
| cisco | secure email gateway virtual appliance c600v |
References
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