CVE-2025-20183

Cisco Secure Web Appliance Range Request Bypass Vulnerability

Published Feb 5, 2025 CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Secure Web Appliance

unknown

Version	Status	Constraints
`11.8.0-453`	affected	—
`12.5.3-002`	affected	—
`12.0.3-007`	affected	—
`12.0.3-005`	affected	—
`14.1.0-032`	affected	—
`14.1.0-047`	affected	—
`14.1.0-041`	affected	—
`12.0.4-002`	affected	—
`14.0.2-012`	affected	—
`11.8.0-414`	affected	—
`12.0.1-268`	affected	—
`11.8.1-023`	affected	—
`11.8.3-021`	affected	—
`11.8.3-018`	affected	—
`12.5.1-011`	affected	—
`11.8.4-004`	affected	—
`12.5.2-007`	affected	—
`12.5.2-011`	affected	—
`14.5.0-498`	affected	—
`12.5.4-005`	affected	—
`12.5.4-011`	affected	—
`12.0.5-011`	affected	—
`14.0.3-014`	affected	—
`12.5.5-004`	affected	—
`12.5.5-005`	affected	—
`12.5.5-008`	affected	—
`14.0.4-005`	affected	—
`14.5.1-008`	affected	—
`14.5.1-016`	affected	—
`15.0.0-355`	affected	—
`15.0.0-322`	affected	—
`12.5.6-008`	affected	—
`15.1.0-287`	affected	—
`14.5.2-011`	affected	—
`15.2.0-116`	affected	—
`14.0.5-007`	affected	—
`15.2.0-164`	affected	—
`14.5.1-510`	affected	—
`12.0.2-012`	affected	—
`12.0.2-004`	affected	—
`14.5.1-607`	affected	—
`14.5.3-033`	affected	—
`14.5.0-673`	affected	—
`14.5.0-537`	affected	—
`12.0.1-334`	affected	—
`14.0.1-503`	affected	—
`14.0.1-053`	affected	—
`11.8.0-429`	affected	—
`14.0.1-040`	affected	—
`14.0.1-014`	affected	—
`12.5.1-043`	affected	—

Configuration 1 [-]

AND

OR	cpe:2.3:o:cisco:asyncos:11.8.0-414:::::::*
	cpe:2.3:o:cisco:asyncos:11.8.0-429:::::::*
	cpe:2.3:o:cisco:asyncos:11.8.0-453:::::::*
	cpe:2.3:o:cisco:asyncos:11.8.1-023:::::::*
	cpe:2.3:o:cisco:asyncos:11.8.3-018:::::::*
	cpe:2.3:o:cisco:asyncos:11.8.3-021:::::::*
	cpe:2.3:o:cisco:asyncos:11.8.4-004:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.1-268:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.1-334:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.2-004:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.2-012:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.3-005:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.3-007:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.4-002:::::::*
	cpe:2.3:o:cisco:asyncos:12.0.5-011:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.1-011:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.1-043:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.2-007:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.2-011:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.3-002:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.4-005:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.4-011:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.5-004:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.5-005:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.5-008:::::::*
	cpe:2.3:o:cisco:asyncos:12.5.6-008:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.1-014:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.1-040:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.1-053:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.1-503:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.2-012:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.3-014:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.4-005:::::::*
	cpe:2.3:o:cisco:asyncos:14.0.5-007:::::::*
	cpe:2.3:o:cisco:asyncos:14.1.0-032:::::::*
	cpe:2.3:o:cisco:asyncos:14.1.0-041:::::::*
	cpe:2.3:o:cisco:asyncos:14.1.0-047:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.0-498:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.0-537:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.0-673:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.1-008:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.1-016:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.1-510:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.1-607:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.2-011:::::::*
	cpe:2.3:o:cisco:asyncos:14.5.3-033:::::::*
	cpe:2.3:o:cisco:asyncos:15.0.0-322:::::::*
	cpe:2.3:o:cisco:asyncos:15.0.0-355:::::::*
	cpe:2.3:o:cisco:asyncos:15.1.0-287:::::::*
	cpe:2.3:o:cisco:asyncos:15.2.0-116:::::::*
	cpe:2.3:o:cisco:asyncos:15.2.0-164:::::::*

OR	cpe:2.3:a:cisco:secure_web_appliance_virtual_s1000v:-:::::::*
	cpe:2.3:a:cisco:secure_web_appliance_virtual_s100v:-:::::::*
	cpe:2.3:a:cisco:secure_web_appliance_virtual_s300v:-:::::::*
	cpe:2.3:a:cisco:secure_web_appliance_virtual_s600v:-:::::::*
	cpe:2.3:h:cisco:secure_web_appliance_s196:-:::::::*
	cpe:2.3:h:cisco:secure_web_appliance_s396:-:::::::*
	cpe:2.3:h:cisco:secure_web_appliance_s696:-:::::::*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-2171	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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.451% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-swa-range-bypass-2BsEHYSu

History

Aug 5, 2025 7:30 PM First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco asyncos Cisco secure Web Appliance S196 Cisco secure Web Appliance S396 Cisco secure Web Appliance S696 Cisco secure Web Appliance Virtual S1000v Cisco secure Web Appliance Virtual S100v Cisco secure Web Appliance Virtual S300v Cisco secure Web Appliance Virtual S600v
Weaknesses		NVD-CWE-noinfo
CPEs		cpe:2.3:a:cisco:secure_web_appliance_virtual_s1000v:-:::::::* cpe:2.3:a:cisco:secure_web_appliance_virtual_s100v:-:::::::* cpe:2.3:a:cisco:secure_web_appliance_virtual_s300v:-:::::::* cpe:2.3:a:cisco:secure_web_appliance_virtual_s600v:-:::::::* cpe:2.3:h:cisco:secure_web_appliance_s196:-:::::::* cpe:2.3:h:cisco:secure_web_appliance_s396:-:::::::* cpe:2.3:h:cisco:secure_web_appliance_s696:-:::::::* cpe:2.3:o:cisco:asyncos:11.8.0-414:::::::* cpe:2.3:o:cisco:asyncos:11.8.0-429:::::::* cpe:2.3:o:cisco:asyncos:11.8.0-453:::::::* cpe:2.3:o:cisco:asyncos:11.8.1-023:::::::* cpe:2.3:o:cisco:asyncos:11.8.3-018:::::::* cpe:2.3:o:cisco:asyncos:11.8.3-021:::::::* cpe:2.3:o:cisco:asyncos:11.8.4-004:::::::* cpe:2.3:o:cisco:asyncos:12.0.1-268:::::::* cpe:2.3:o:cisco:asyncos:12.0.1-334:::::::* cpe:2.3:o:cisco:asyncos:12.0.2-004:::::::* cpe:2.3:o:cisco:asyncos:12.0.2-012:::::::* cpe:2.3:o:cisco:asyncos:12.0.3-005:::::::* cpe:2.3:o:cisco:asyncos:12.0.3-007:::::::* cpe:2.3:o:cisco:asyncos:12.0.4-002:::::::* cpe:2.3:o:cisco:asyncos:12.0.5-011:::::::* cpe:2.3:o:cisco:asyncos:12.5.1-011:::::::* cpe:2.3:o:cisco:asyncos:12.5.1-043:::::::* cpe:2.3:o:cisco:asyncos:12.5.2-007:::::::* cpe:2.3:o:cisco:asyncos:12.5.2-011:::::::* cpe:2.3:o:cisco:asyncos:12.5.3-002:::::::* cpe:2.3:o:cisco:asyncos:12.5.4-005:::::::* cpe:2.3:o:cisco:asyncos:12.5.4-011:::::::* cpe:2.3:o:cisco:asyncos:12.5.5-004:::::::* cpe:2.3:o:cisco:asyncos:12.5.5-005:::::::* cpe:2.3:o:cisco:asyncos:12.5.5-008:::::::* cpe:2.3:o:cisco:asyncos:12.5.6-008:::::::* cpe:2.3:o:cisco:asyncos:14.0.1-014:::::::* cpe:2.3:o:cisco:asyncos:14.0.1-040:::::::* cpe:2.3:o:cisco:asyncos:14.0.1-053:::::::* cpe:2.3:o:cisco:asyncos:14.0.1-503:::::::* cpe:2.3:o:cisco:asyncos:14.0.2-012:::::::* cpe:2.3:o:cisco:asyncos:14.0.3-014:::::::* cpe:2.3:o:cisco:asyncos:14.0.4-005:::::::* cpe:2.3:o:cisco:asyncos:14.0.5-007:::::::* cpe:2.3:o:cisco:asyncos:14.1.0-032:::::::* cpe:2.3:o:cisco:asyncos:14.1.0-041:::::::* cpe:2.3:o:cisco:asyncos:14.1.0-047:::::::* cpe:2.3:o:cisco:asyncos:14.5.0-498:::::::* cpe:2.3:o:cisco:asyncos:14.5.0-537:::::::* cpe:2.3:o:cisco:asyncos:14.5.0-673:::::::* cpe:2.3:o:cisco:asyncos:14.5.1-008:::::::* cpe:2.3:o:cisco:asyncos:14.5.1-016:::::::* cpe:2.3:o:cisco:asyncos:14.5.1-510:::::::* cpe:2.3:o:cisco:asyncos:14.5.1-607:::::::* cpe:2.3:o:cisco:asyncos:14.5.2-011:::::::* cpe:2.3:o:cisco:asyncos:14.5.3-033:::::::* cpe:2.3:o:cisco:asyncos:15.0.0-322:::::::* cpe:2.3:o:cisco:asyncos:15.0.0-355:::::::* cpe:2.3:o:cisco:asyncos:15.1.0-287:::::::* cpe:2.3:o:cisco:asyncos:15.2.0-116:::::::* cpe:2.3:o:cisco:asyncos:15.2.0-164:::::::*
Vendors & Products		Cisco Cisco asyncos Cisco secure Web Appliance S196 Cisco secure Web Appliance S396 Cisco secure Web Appliance S696 Cisco secure Web Appliance Virtual S1000v Cisco secure Web Appliance Virtual S100v Cisco secure Web Appliance Virtual S300v Cisco secure Web Appliance Virtual S600v

Jul 16, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00045}`	epss `{'score': 0.00079}`

Feb 5, 2025 5:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Feb 5, 2025 4:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Cisco Secure Web Appliance Range Request Bypass Vulnerability
Weaknesses		CWE-20
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-swa-range-bypass-2BsEHYSu
Metrics		cvssV3_1 `{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}`

Subscriptions

Cisco Asyncos Secure Web Appliance S196 Secure Web Appliance S396 Secure Web Appliance S696 Secure Web Appliance Virtual S1000v Secure Web Appliance Virtual S100v Secure Web Appliance Virtual S300v Secure Web Appliance Virtual S600v

Weaknesses