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.
Password theft has recently dominated headlines, with billions of credentials compromised. Amid this crisis, Microsoft has been pushing to replace traditional passwords with more secure authentication methods. However, a new vulnerability in the Windows BitLocker full-disk encryption tool has raised concerns about the security of even the most advanced encryption systems.
A medium-severity flaw in BitLocker, identified as CVE-2025-21210, has exposed the encryption system to a novel randomization attack targeting the AES-XTS encryption mode. This vulnerability highlights the increasing sophistication of cyberattacks against full-disk encryption systems. When exploited, it allows attackers to alter ciphertext blocks, causing sensitive data to be written to disk in plaintext.
Jason Soroko, Senior Fellow at Sectigo, explained the implications of this vulnerability. “BitLocker uses AES-XTS encryption to ensure that even if someone physically accesses the hard drive, they cannot easily read the data without the encryption key,” he noted. However, this new attack bypasses traditional decryption methods by manipulating how encrypted data is handled.
To illustrate the attack, Soroko used an analogy involving a library of books. “Rather than stealing or directly reading the books, the hacker subtly modifies certain pages (the ciphertext blocks) in multiple books,” he explained. While the rest of the book remains intact and unreadable, tampering with specific pages can cause the library’s system to misplace or disclose critical data.
Over time, these subtle modifications can lead to bits of data being written in plaintext, exposing sensitive information without directly breaking the encryption. “The real danger is that this method doesn’t require breaking the encryption directly,” Soroko concluded. “Instead, it manipulates how the encrypted data is handled, allowing attackers to bypass security measures and access sensitive information.”
To defend against such attacks, Soroko emphasized the importance of keeping encryption software up-to-date with the latest security patches. Additionally, organizations should:
This vulnerability underscores the evolving nature of cyber threats. Even robust encryption systems like BitLocker are not immune to sophisticated attacks. As cybercriminals develop new methods to exploit vulnerabilities, organizations must remain vigilant and proactive in their cybersecurity strategies.
Microsoft’s push toward passwordless authentication is a step in the right direction, but this incident highlights the need for continuous improvement in encryption technologies. Companies must invest in advanced security solutions, regular system updates, and employee training to stay ahead of emerging threats.
The BitLocker vulnerability serves as a stark reminder that no system is entirely foolproof. As encryption technologies evolve, so do the methods used to exploit them. Organizations must adopt a multi-layered approach to cybersecurity, combining encryption with other protective measures to safeguard sensitive data. By staying informed and proactive, we can better defend against the ever-changing landscape of cyber threats.
Virtual Private Networks (VPNs) are widely trusted for protecting online privacy, bypassing regional restrictions, and securing sensitive data. However, new research has uncovered serious flaws in some VPN protocols, exposing millions of systems to potential cyberattacks.
A study by Top10VPN, conducted in collaboration with cybersecurity expert Mathy Vanhoef, highlights these alarming issues. The research, set to be presented at the USENIX 2025 Conference, reveals vulnerabilities in VPN tunnelling protocols affecting over 4 million systems worldwide. Impacted systems include:
Tunneling protocols are essential mechanisms that encrypt and protect data as it travels between a user and a VPN server. However, the study identified critical weaknesses in specific protocols, including:
These vulnerabilities allow attackers to bypass security measures by sending manipulated data packets through the affected protocols, enabling unauthorized access and a range of malicious activities, such as:
Advanced encryption tools like IPsec and WireGuard play a crucial role in safeguarding data. These technologies provide strong end-to-end encryption, ensuring data is decoded only by the intended server. This added security layer prevents hackers from exploiting weak points in VPN systems.
The vulnerabilities are not confined to specific regions. They predominantly affect servers and services in the following countries:
Both individual users and large organizations are impacted, emphasizing the need for vigilance and regular updates.
To enhance VPN security, consider these steps:
This research serves as a critical reminder: while VPNs are designed to protect privacy, they are not immune to flaws. Users must remain proactive, prioritize robust security features, and stay informed about emerging vulnerabilities.
By taking these precautions, both individuals and organizations can significantly reduce the risks associated with these newly discovered VPN flaws. Remember, no tool is entirely foolproof — staying informed is the key to online safety.
On January 14, 2025, it was reported that the configuration data of over 15,000 Fortinet FortiGate firewalls was leaked on the dark web. The hacker group, identified as Belsen, shared this data for free on its newly created TOR website. The leaked information includes full firewall configurations, plaintext VPN credentials organized by IP address and country, serial numbers, management certificates, and other sensitive data. This breach poses a significant security risk to affected organizations, as it enables attackers to compromise internal networks with ease.
According to cybersecurity analysts, the Belsen Group exploited a zero-day vulnerability, identified as CVE-2022-40684, to obtain the leaked data. This vulnerability, published in 2022, allowed attackers to bypass administrative authentication through specially crafted HTTP/HTTPS requests. By leveraging this flaw, the attackers exfiltrated configuration files containing sensitive details such as passwords, firewall rules, and advanced settings. These files, though obtained in 2022, remained undisclosed until January 2025, significantly increasing the risk exposure for affected organizations.
In response to this ongoing threat, Fortinet released patches for CVE-2022-40684 and announced a new critical authentication bypass vulnerability, CVE-2024-55591, on the same day the leak was disclosed. This new vulnerability is being actively exploited in campaigns targeting FortiGate firewalls, particularly those with public-facing administrative interfaces. Devices running outdated FortiOS versions are especially at risk.
The leaked configuration files provide a comprehensive map of victim networks, including firewall rules and administrator credentials. Threat actors can exploit this information to:
Organizations affected by this breach must take immediate action to mitigate risks. This includes:
Cybersecurity expert Kevin Beaumont has announced plans to release an IP list from the leak to help FortiGate administrators determine if their devices were affected. Meanwhile, security firms like CloudSEK and Arctic Wolf have emphasized the importance of prioritizing updates and vigilance against future exploitation campaigns.
Fortinet devices' history of vulnerabilities has made them frequent targets for cybercriminals and nation-state actors. Addressing these security gaps is crucial to preventing further breaches and protecting sensitive organizational data.