CVE-2025-20363 Details
A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure Firewall Threat Defense (FTD) Software, Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, remote attacker (Cisco ASA and FTD Software) or authenticated, remote attacker (Cisco IOS, IOS XE, and IOS XR Software) with low user privileges to execute arbitrary code on an affected device.

This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web service on an affected device after obtaining additional information about the system, overcoming exploit mitigations, or both. A successful exploit could allow the attacker to execute arbitrary code as root, which may lead to the complete compromise of the affected device.

For more information about this vulnerability, see the Details ["#details"] section of this advisory.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2025-20363
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.98 Probability of exploitation activity being observed over the next 30 days (76th percentile)
CVSS score for CVE-2025-20363
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9 Critical
Products affected by CVE-2025-20363
IOS 12.3
IOS XE 16.6.4
IOS XE 16.9.4
IOS XE 16.9.8
IOS XE 17.3.4a
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Medium
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CVE-2025-20363 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
RU 108 65.45%
KR 20 12.12%
PE 16 9.70%
GB 4 2.42%
US 4 2.42%
FR 2 1.21%
ID 2 1.21%
IN 2 1.21%
BD 1 0.61%
CN 1 0.61%

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CVE-2025-20363 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 112 97.39%
Education 1 0.87%
Technology 1 0.87%
Food Production 1 0.87%

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