Realtek flaws being used in attacks

CISA lists 3 flaws in Realtek products as being used in attacks, most recently on 18 Sep 2023.

What to do

1. Update every Realtek product you use.Install the updates Realtek offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksAdded by CISA on 18 Sep 2023
   Realtek SDK
   CVE-2014-8361Realtek SDK Improper Input Validation Vulnerability
   Realtek SDK contains an improper input validation vulnerability in the miniigd SOAP service that allows remote attackers to execute malicious code via a crafted NewInternalClient request.
   CISA’s required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksAdded by CISA on 10 Dec 2021
   Realtek Jungle Software Development Kit (SDK)
   CVE-2021-35394Realtek Jungle SDK Remote Code Execution Vulnerability
   RealTek Jungle SDK contains multiple memory corruption vulnerabilities which can allow an attacker to perform remote code execution.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
3. Being used in attacksAdded by CISA on 3 Nov 2021
   Realtek AP-Router SDK
   CVE-2021-35395Realtek AP-Router SDK Buffer Overflow Vulnerability
   Realtek AP-Router SDK HTTP web server boa contains a buffer overflow vulnerability due to unsafe copies of some overly long parameters submitted in the form that lead to denial-of-service (DoS).
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. Realtek on CISA’s site.