5.8

CVE-2025-20183: cisco asyncos Improper Input Validation

CVSS: 5.8v3.1MediumAnalyzed
Published 05-02-2025Last modified 05-02-2025
Open JSON

Vulnerability summary

CVE-2025-20183 is a medium (CVSS 5.8) Improper Input Validation vulnerability in cisco asyncos. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.7% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.44%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-02-2025
    PublishedVulnerability first disclosed.
  2. 05-02-2025
    Last modifiedVulnerability information updated.

Description

A vulnerability in a policy-based Cisco Application Visibility and Control (AVC) implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to evade the antivirus scanner and download a malicious file onto an endpoint. The vulnerability is due to improper handling of a crafted range request header. An attacker could exploit this vulnerability by sending an HTTP request with a crafted range request header through the affected device. A successful exploit could allow the attacker to evade the antivirus scanner and download malware onto the endpoint without detection by Cisco Secure Web Appliance.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

0.00 pp

From 0.44% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • asyncos11.8.0-414 | 11.8.0-429 | 11.8.0-453 | 11.8.1-023 | 11.8.3-018 | 11.8.3-021 | 11.8.4-004 | 12.0.1-268 | 12.0.1-334 | 12.0.2-004 | 12.0.2-012 | 12.0.3-005 | 12.0.3-007 | 12.0.4-002 | 12.0.5-011 | 12.5.1-011 | 12.5.1-043 | 12.5.2-007 | 12.5.2-011 | 12.5.3-002 | 12.5.4-005 | 12.5.4-011 | 12.5.5-004 | 12.5.5-005 | 12.5.5-008 | 12.5.6-008 | 14.0.1-014 | 14.0.1-040 | 14.0.1-053 | 14.0.1-503 | 14.0.2-012 | 14.0.3-014 | 14.0.4-005 | 14.0.5-007 | 14.1.0-032 | 14.1.0-041 | 14.1.0-047 | 14.5.0-498 | 14.5.0-537 | 14.5.0-673 | 14.5.1-008 | 14.5.1-016 | 14.5.1-510 | 14.5.1-607 | 14.5.2-011 | 14.5.3-033 | 15.0.0-322 | 15.0.0-355 | 15.1.0-287 | 15.2.0-116 | 15.2.0-164
  • cisco secure web appliance11.8.0-453 | 12.5.3-002 | 12.0.3-007 | 12.0.3-005 | 14.1.0-032 | 14.1.0-047 | 14.1.0-041 | 12.0.4-002 | 14.0.2-012 | 11.8.0-414 | 12.0.1-268 | 11.8.1-023 | 11.8.3-021 | 11.8.3-018 | 12.5.1-011 | 11.8.4-004 | 12.5.2-007 | 12.5.2-011 | 14.5.0-498 | 12.5.4-005 | 12.5.4-011 | 12.0.5-011 | 14.0.3-014 | 12.5.5-004 | 12.5.5-005 | 12.5.5-008 | 14.0.4-005 | 14.5.1-008 | 14.5.1-016 | 15.0.0-355 | 15.0.0-322 | 12.5.6-008 | 15.1.0-287 | 14.5.2-011 | 15.2.0-116 | 14.0.5-007 | 15.2.0-164 | 14.5.1-510 | 12.0.2-012 | 12.0.2-004 | 14.5.1-607 | 14.5.3-033 | 14.5.0-673 | 14.5.0-537 | 12.0.1-334 | 14.0.1-503 | 14.0.1-053 | 11.8.0-429 | 14.0.1-040 | 14.0.1-014 | 12.5.1-043

1 vendor · 2 products

References

1 links