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Cisco disclosed CVE-2026-20173, a medium-severity vulnerability in Cisco NX-OS Software that lets an unauthenticated, remote attacker exhaust system resources and cause a denial of service (DoS). The flaw exists because rate limiting is improperly applied to some protocols. The DoS condition clears without manual intervention soon after t…
The US State Department is offering up to US $10 million through Rewards for Justice for information on Zhang Yu, 44, a Chinese national accused of being a key figure in the state-sponsored group Hafnium (also tracked as Silk Typhoon). Zhang is described as a director at Shanghai Firetech Information Science and Technology, working under …
In October 2026, the Discord server protection service Double Counter suffered a data breach attributed to a vulnerability in the Metabase analytics tool. The company's disclosure notice states that attackers accessed a subset of its data. That data was later published publicly and contains about 275k unique email addresses and Discord us…
Copyright takedown requests tied to OnlyFans and other adult content creators are exposing how attackers exploit vulnerable university and government websites to manipulate search results. The takedown notices act as a visible indicator of compromised sites that were abused to host or promote content for search engine manipulation. UpGuar…
AI pen-testing startup Terra Security reports a sharp rise in security fixes later found to be bypassed or incomplete. The share of GitHub security fixes needing a follow-up advisory for a failed patch within 90 days held near 0.2% from 2019 to 2025 but jumped to 2.3% in 2026. Terra links the trend to the 2026 explosion in AI-driven vulne…
MITRE released version 20 of its ATT&CK framework, expanding coverage of recent adversary tradecraft across the Enterprise, ICS and Mobile domains. Enterprise gains nine techniques and sub-techniques, including two prompt injection techniques (direct and indirect), abuse of an organization's own AI agents for data theft, poisoning of web …
Rapid7's Q3 2026 threat landscape report finds that high-severity vulnerabilities were exploited an average of three days after disclosure, with 71% exploited within the first seven days. 79% of them are classed as 'holy grail' flaws, meaning remote and needing no credentials or user interaction. Ransomware remains the dominant threat. Th…
Nord Security reports 2,894 ransomware attacks between July and September 2026, a 50% increase year over year and an 8.6% rise over Q2 2026. Researchers attribute the rebound to the market stabilizing after law enforcement takedowns of LockBit, BlackCat and RansomHub, which suppressed activity during 2025. The Gentlemen (383 attacks) narr…
Researcher Pedro Cruz (gankd) documents two Client-Side Path Traversal (CSPT) chains found in production bug bounty programs. The first turns CSPT into Stored XSS and account takeover on a payments platform's Angular POS single-page application. The second, found with Felipe Torres, triggers unauthorized account deletion on one of the lar…
TrendAI™ (Trend Micro) published its H1 2026 APT Activity Roundup on July 29, 2026. It finds nation-state actors used AI in more stages of the intrusion lifecycle than in any prior half-year the company has tracked. China-aligned actors used generative AI to refine exploits and iteratively build malware through "vibe coding", and one AI a…
Resilience's report Cyber risk in energy and utilities analyzes cyber insurance claims filed between Jan. 1, 2023 and Sept. 5, 2026. Email compromise made up 21% of energy and utilities claims, against 10% across the rest of the portfolio. Ransomware was only 9% of claims but about 70% of incurred losses including reserves. In several cas…
ESET analysis describes a two-pronged risk for small and mid-size businesses (SMBs): AI agents create new paths into business systems, while attackers use AI to add speed and scale to established threats. Between March and May 2026, ESET scanned almost 900,000 unique agent skills from popular repositories and found more than 25,000 suspic…
Unit 42 Threat Intelligence published its overview of the top five initial access threat vectors observed in September 2026. Adversary activity relied heavily on external edge exploitation and identity compromise, with public-facing infrastructure and legitimate credential abuse as the primary footholds for intrusion campaigns. Social eng…
