CVE-2025-20393
Last modified
CVE-2025-20393 is a critical-severity vulnerability rated 10/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 29.06% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Asyncos | < 15.0.5-016 |
| Cisco | Asyncos | >= 15.5, < 15.5.4-012 |
| Cisco | Asyncos | >= 16.0, < 16.0.4-016 |
| Cisco | Asyncos | < 15.0.2-007 |
| Cisco | Asyncos | >= 15.5, < 15.5.4-007 |
| Cisco | Asyncos | >= 16.0, < 16.0.4-010 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-20393?
How severe is CVE-2025-20393?
How do I fix CVE-2025-20393?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-20385In Splunk Enterprise versions below 10.0.2, 9.4.6, 9.3.8, an…4.8
- CVE-2025-20386In Splunk Enterprise for Windows versions below 10.0.2, 9.4.…6.5
- CVE-2025-20387In Splunk Universal Forwarder for Windows versions below 10.…6.5
- CVE-2025-20388In Splunk Enterprise versions below 10.0.1, 9.4.6, 9.3.8, an…2.7
- CVE-2025-20389In Splunk Enterprise versions below 10.0.2, 9.4.6, 9.3.8, an…6.5
- CVE-2025-2039A vulnerability classified as critical has been found in cod…7.2
- CVE-2025-2040A vulnerability classified as critical was found in zhijiant…6.3
- CVE-2025-2041A vulnerability, which was classified as critical, has been …9.8
- CVE-2025-2042A vulnerability has been found in huang-yk student-manage 1.…6.5
- CVE-2025-2043A vulnerability was found in LinZhaoguan pb-cms 1.0.0 and cl…7.2
- CVE-2025-2044A vulnerability was found in code-projects Blood Bank Manage…7.2
- CVE-2025-2045Improper authorization in GitLab EE affecting all versions f…4.3
Are you affected by CVE-2025-20393?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST