A newly discovered security hole in SAP’s NetWeaver platform is now being misused by cybercriminals, including ransomware gangs. This flaw allows attackers to run harmful commands on vulnerable systems from a distance—without even needing to log in.
SAP issued urgent software updates on April 24 after learning about the flaw, found in NetWeaver’s Visual Composer tool. The weakness, labeled CVE-2025-31324, makes it possible for attackers to upload files containing malware. Once inside, they can take full control of the affected system.
ReliaQuest, a cybersecurity firm that tracked this issue, now says that two known ransomware groups, RansomEXX and BianLian have joined in. Although they haven’t yet successfully launched any ransomware in these cases, their involvement shows that multiple criminal groups are watching this flaw closely.
Investigators linked BianLian to at least one incident using an IP address tied to their past operations. In another case, RansomEXX attackers used a backdoor tool called PipeMagic and also took advantage of a previously known bug in Microsoft’s Windows system (CVE-2025-29824).
Even though their first effort didn’t succeed, the attackers made another attempt using a powerful hacking framework called Brute Ratel. They delivered it using a built-in Microsoft function called MSBuild, which helped them run the attack in a sneaky way.
More recently, security teams from Forescout and EclecticIQ connected this activity to hackers linked to China. These groups, tracked under various names, were also found to be exploiting the same SAP vulnerability. In fact, they managed to secretly install backdoors on at least 581 SAP systems, including some tied to national infrastructure in the US, UK, and Saudi Arabia. Their plans may also include targeting nearly 2,000 more systems soon.
Experts believe these hidden access points could help foreign state-sponsored hackers gather intelligence, interfere with operations, or even achieve military or economic goals. Since SAP systems are often connected to important internal networks, the damage could spread quickly within affected organizations.
SAP has also fixed another weakness (CVE-2025-42999), which had been silently misused since March. To stay safe, system administrators are advised to apply the patches immediately. If they can’t update right away, disabling the Visual Composer tool can help. They should also restrict access to certain features and monitor their systems closely for anything unusual.
The US government’s cyber agency CISA has officially listed this flaw as a known risk. Federal departments were told to patch their systems by May 20 to avoid falling victim.
A VPN enhances online privacy by encrypting internet traffic and masking IP addresses. However, how often should you switch servers? The answer depends on your goals and usage patterns, as server hopping offers benefits but is not always necessary.
A VPN server acts as an intermediary between your device and the internet, creating an encrypted tunnel for your data. This ensures that your online activity remains private and your information is protected from hackers, ISPs, and other snoopers. The VPN server assigns a new IP address to mask your location and identity.
Switching servers can sometimes boost privacy in specific situations, such as for users facing surveillance or censorship. For most users, however, keeping the VPN connected to a single server is sufficient to maintain privacy. Regularly switching servers can disrupt your browsing experience without significantly enhancing security.
One of the primary reasons for server switching is to bypass geographic restrictions. Many streaming platforms and websites restrict content based on location, but connecting to a server in a different country can help access otherwise unavailable material. This is particularly useful for travelers or those in regions with heavy internet censorship.
Some VPNs offer specialized servers for tasks like streaming, torrenting, or gaming. While these servers are optimized for specific activities, switching back to a general server after completing the task can provide a better overall experience for everyday browsing.
Server performance can vary based on factors like server load and proximity to your physical location. If a server is overcrowded or located far away, switching to a closer or less busy one can improve connection speed and stability. This is especially helpful for users seeking faster downloads or uninterrupted streaming.
Server hopping can also help save money when shopping online. Many websites adjust prices based on the user’s location. By connecting to servers in different regions, you may find lower prices on flights, hotels, or products. Experimenting with various locations can help uncover better deals.
Access issues can arise when certain VPN IP addresses are flagged or blacklisted due to misuse by other users. In such cases, switching to a different server can resolve the problem. Some VPNs also offer dedicated IP addresses for an additional fee, reducing the risk of being blocked.
Despite these advantages, most users don’t need to switch servers frequently. A consistent connection to a single server already provides privacy and security benefits. Unless you’re trying to bypass geo-restrictions, troubleshoot access issues, or improve connection speed, sticking to one server is generally sufficient.
Ultimately, server hopping is a useful feature for those with specific needs but isn’t essential for everyday VPN use. By understanding how and when to switch servers, you can make the most of your VPN experience while maintaining privacy and performance.