Stored cross-site scripting in Linksys WAG200G policy_name field
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Linksys WAG200G through 1.01.06 contains a stored cross-site scripting flaw (CWE-79). Input in the policy_name parameter of setup.cgi is stored without neutralization, so scripts run in the browser of an administrator who views the Status > Wireless page. An authenticated attacker can save a malicious policy name from the AccessRes.htm page to trigger this. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
Description from the CNA
Linksys WAG200G through 1.01.06 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject scripts via the policy_name parameter in setup.cgi. Attackers can save a malicious policy name from the AccessRes.htm page that executes in administrators' browsers when viewing the Status > Wireless page.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Linksys WAG200G.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
Timeline
- 2026-10-28 Threatist record created from CVE-2013-20009
- 2026-10-28 Alias added: GHSA-x9c2-j44q-2h83
- 2026-11-03 CISA SSVC decision points changed
- 2026-11-03 Priority changed: LOW → MEDIUM
References
More Linksys vulnerabilities
- TI-2025-24206 Linksys Routers E/WAG/WAP/WES/WET/WRT-Series CVSS 4.0CRITICAL 10.0
- TI-2017-12715 OS command injection in Linksys WVBR0 CVSS 3.0CRITICAL 9.8
- TI-2026-70977 Stack-based buffer overflow in Linksys E1700 Mac Filter CVSS 4.0CRITICAL 10.0
- TI-2026-22199 Missing neutralization in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
- TI-2026-22198 Missing neutralization in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
- TI-2026-22197 Missing authentication in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
Sources
- CVE-2013-20009 · CVE Program
- CVE-2013-20009 · NVD
- FIRST EPSS
- GHSA-x9c2-j44q-2h83 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences