• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

SonicWall fixed critical flaw in SMA 100 devices exploited in Overstep malware attacks

 | 

DSPM & AI Are Booming: $17.87B and $4.8T Markets by 2033

 | 

Stealth backdoor found in WordPress mu-Plugins folder

 | 

U.S. CISA adds CrushFTP, Google Chromium, and SysAid flaws to its Known Exploited Vulnerabilities catalog

 | 

U.S. CISA urges FCEB agencies to fix two Microsoft SharePoint flaws immediately and added them to its Known Exploited Vulnerabilities catalog

 | 

Sophos fixed two critical Sophos Firewall vulnerabilities

 | 

French Authorities confirm XSS.is admin arrested in Ukraine

 | 

Microsoft linked attacks on SharePoint flaws to China-nexus actors

 | 

Cisco confirms active exploitation of ISE and ISE-PIC flaws

 | 

SharePoint under fire: new ToolShell attacks target enterprises

 | 

CrushFTP zero-day actively exploited at least since July 18

 | 

Hardcoded credentials found in HPE Aruba Instant On Wi-Fi devices

 | 

MuddyWater deploys new DCHSpy variants amid Iran-Israel conflict

 | 

U.S. CISA urges to immediately patch Microsoft SharePoint flaw adding it to its Known Exploited Vulnerabilities catalog

 | 

Microsoft issues emergency patches for SharePoint zero-days exploited in "ToolShell" attacks

 | 

SharePoint zero-day CVE-2025-53770 actively exploited in the wild

 | 

Singapore warns China-linked group UNC3886 targets its critical infrastructure

 | 

U.S. CISA adds Fortinet FortiWeb flaw to its Known Exploited Vulnerabilities catalog

 | 

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 54

 | 

Security Affairs newsletter Round 533 by Pierluigi Paganini – INTERNATIONAL EDITION

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Hacking
  • Security
  • U.S. CISA adds Microsoft Windows, Zyxel device flaws to its Known Exploited Vulnerabilities catalog

U.S. CISA adds Microsoft Windows, Zyxel device flaws to its Known Exploited Vulnerabilities catalog

Pierluigi Paganini February 12, 2025

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Windows, Zyxel device flaws to its Known Exploited Vulnerabilities catalog.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog:

  • CVE-2024-40891 Zyxel DSL CPE OS Command Injection Vulnerability
  • CVE-2024-40890 Zyxel DSL CPE OS Command Injection Vulnerability
  • CVE-2025-21418 Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability
  • CVE-2025-21391 Microsoft Windows Storage Link Following Vulnerability

The vulnerability CVE-2024-40891 is a command injection issue in Zyxel CPE Series devices that remains unpatched and has not yet been publicly disclosed. Attackers can exploit this flaw to execute arbitrary commands on affected devices, potentially resulting in device takeover, data exfiltration, or network infiltration.

“CVE-2024-40891 is very similar to CVE-2024-40890 (observed authentication attempts, observed command injection attempts), with the main difference being that the former is telnet-based while the latter is HTTP-based.” reads the advisory published by GreyNoise. “Both vulnerabilities allow unauthenticated attackers to execute arbitrary commands using service accounts (supervisor and/or zyuser).”

VulnCheck disclosed the Zyxel CPE Telnet command injection flaw CVE-2024-40891 on August 1, 2024, but the vendor has yet to publish an advisory. GreyNoise researchers collaborated with VulnCheck to verify the detection and created a tag for the issue on January 21, 2025. Due to widespread attacks, the disclosure was made immediately without vendor coordination.

GreyNoise observed thousands of attack attempts originated from multiple IP addresses, most of them located in Taiwan. Cybersecurity firm Censys reported that more than 1,500 online devices are affected by the vulnerability.

The vulnerability CVE-2024-40890 is a post-authentication command injection issue in the CGI program of the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615. An authenticated attacker could exploit the vulnerability to execute operating system (OS) commands on an affected device by sending a crafted HTTP POST request.

The two flaws in Microsoft Windows added to the KeV Catalog were addressed with the release of the Microsoft Patch Tuesday security updates for February 2025. The two zero-day flaws are actively exploited in the wild.

The actively exploited vulnerabilities are a Windows Storage Elevation of Privilege Vulnerability (CVE-2025-21391) and Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability (CVE-2025-21418).

CVE-2025-21391 is a Windows Storage privilege escalation flaw exploited in the wild. It allows attackers to delete files and may be paired with code execution for full system takeover.

“An attacker would only be able to delete targeted files on a system.” reads the advisory. “This vulnerability does not allow disclosure of any confidential information, but could allow an attacker to delete data that could include data that results in the service being unavailable.”

CVE-2025-21418 is a Windows Ancillary Function Driver for WinSock privilege escalation flaw. It could allow an authenticated user to run a crafted program to gain SYSTEM privileges, likely paired with code execution for full system takeover.

“An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.” reads the advisory.

Follow me on Twitter: @securityaffairs and Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, CISA Known Exploited Vulnerabilities catalog)


facebook linkedin twitter

CISA Hacking hacking news information security news IT Information Security Known Exploited Vulnerabilities Catalog Pierluigi Paganini Security Affairs Security News

you might also like

Pierluigi Paganini July 24, 2025
SonicWall fixed critical flaw in SMA 100 devices exploited in Overstep malware attacks
Read more
Pierluigi Paganini July 24, 2025
DSPM & AI Are Booming: $17.87B and $4.8T Markets by 2033
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    SonicWall fixed critical flaw in SMA 100 devices exploited in Overstep malware attacks

    Security / July 24, 2025

    DSPM & AI Are Booming: $17.87B and $4.8T Markets by 2033

    Security / July 24, 2025

    Stealth backdoor found in WordPress mu-Plugins folder

    Malware / July 24, 2025

    U.S. CISA adds CrushFTP, Google Chromium, and SysAid flaws to its Known Exploited Vulnerabilities catalog

    Hacking / July 24, 2025

    U.S. CISA urges FCEB agencies to fix two Microsoft SharePoint flaws immediately and added them to its Known Exploited Vulnerabilities catalog

    Hacking / July 23, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT