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Anthropic says Claude Mythos Preview helped derive an end-to-end key-recovery attack against HAWK-256 and a 200- to 800-fold speedup for an attack on seven-round AES-128. The HAWK attack exploits a previously unused symmetry in the lattice behind the signature scheme. Anthropic's released implementation gives an expected end-to-end runtime of about three hours and 42 minutes on a 96-core server. The AES result removes a 256-way guessing step from an existing meet-in-the-middle attack. Anthropic said neither result affects production systems. HAWK remains a candidate in a National Institute of Standards and Technology (NIST) post-quantum standardization process, and the public recovery code only targets the smaller HAWK-256 parameter. The Advanced Encryption Standard (AES) result applies to seven of AES-128's ten rounds and still requires an impractical number of chosen plaintexts. The company said no production software needs to change as a result. Anthropic published...

A new Mirai-derived botnet called Tengu can use a compromised Linux device's hardware watchdog to trigger a reboot when defenders kill its main process. If that happens, Tengu's other persistence mechanisms get another chance to relaunch it. Nozomi Networks Labs observed the dropper reaching its honeypots through Telnet credential brute force. Tengu supports 25 distributed denial-of-service (DDoS) methods. It can also run a SOCKS5 proxy, execute shell commands, and collect system and network data. The malware can update itself and retrieve additional Executable and Linkable Format (ELF) or Android package (APK) payloads. Nozomi listed architecture-specific samples for i386, amd64, MIPS, ARM, PowerPC, and m68k. The report identifies no specific vendor or device model. It also names no operator, infection count, or real-world DDoS victims. It shows what Tengu can do, not how far it has spread. Defenders should start by removing internet exposure for Telnet and other unne...

Cybersecurity researchers have sounded an alert after finding more than 36,000 Baseboard Management Controller (BMC) management interfaces exposing Intelligent Platform Management Interface (IPMI) protocol to the public internet. Of the 36,872 internet-exposed server-management interfaces running IPMI, 24,650 have been found to disclose password-derived authentication hashes before login due to a vulnerability with the IPMI v2.0 specification itself, according to a new report Lava shared with The Hacker News. IPMI v2.0 was introduced in February 2024. The issue in question is CVE-2013-4786 (CVSS score: 7.5), a high-severity information disclosure flaw that enables remote attackers to obtain password hashes for valid accounts and conduct offline password guessing attacks by obtaining the HMAC from an RMCP+ Authenticated Key-Exchange Protocol (RAKP) message response from a BMC. Per an advisory released by Dell, "this is an inherent problem with the specification for IPMI ...

JFrog has confirmed that OpenAI models exploited a zero-day in self-hosted Artifactory while trying to reach the open internet from a sealed evaluation environment. Artifactory is JFrog's software repository manager. OpenAI says the models then escalated privileges and moved laterally until they reached an internet-connected node. JFrog says it has since developed and released fixes for cloud and self-hosted customers. The Artifactory exploit occurred inside OpenAI's environment. OpenAI says a separate attack path later reached Hugging Face's systems. JFrog says its cloud customers are already protected. Self-hosted users should review the Artifactory release notes and move to the remediating build for their maintained branch. Several Artifactory CVE records were published on July 27 with affected-version ranges and fixed-version thresholds, but neither JFrog nor OpenAI has said whether any of those records correspond to the vulnerabilities used during the evaluati...

OpenWrt has shipped version 24.10.8 to close a critical DHCPv6 stack overflow and a wider set of remotely triggerable flaws in network services enabled by default. The critical issue, tracked as CVE-2026-53921 and rated 9.8 on CVSS 3.1 in OpenWrt's GitHub advisory, lets an unauthenticated attacker able to reach the DHCPv6 server overwrite a stack buffer in odhcpd through a crafted DHCPv6 REQUEST. odhcpd runs as root, and the advisory notes that embedded hardware commonly lacks stack canaries and address space layout randomization (ASLR), making code execution a realistic outcome on typical devices. The advisory includes public Python proof-of-concept code for both documented overflow paths. Users on the 24.10 branch should install 24.10.8, while users on 25.12 should install 25.12.5; firmware images are available through the OpenWrt Firmware Selector. As of July 28, the reviewed OpenWrt materials did not report exploitation in the wild. The flaw was also absent from CISA...