nuclei

GreyNoise Detects Active Exploitation Attempts of CVE-2021-36260 Against Hikvision Cameras

GreyNoise recorded exploitation attempts targeting CVE-2021-36260 in Hikvision cameras and recorders between September 21 and October 1. The vulnerability carries a CVSS score of 9.8 and allows unauthenticated remote command execution through insufficient input validation in the embedded web server. Attack traffic originated from four IP addresses, three routed through a commercial VPN in Lithuania and one from a Ukrainian residential network, with all targets located in Ukraine. Attackers leveraged a publicly available Nuclei template to probe devices, though GreyNoise confirmed only scanning activity and not successful compromises. The five-year-old flaw remains actively scanned despite an available firmware patch from Hikvision and a CISA advisory recommending immediate updates. Password changes provide no protection because the attack requires no authentication. Defenders are advised to apply firmware updates, remove devices from public internet exposure, and segment video surveillance networks from critical infrastructure.

Attackers Exploit Critical Atlassian Data Center Flaw CVE-2026-21589 Hours After PoC Release

Exploitation attempts against CVE-2026-21589 began almost immediately after technical details and a Nuclei template were published. The vulnerability allows unauthenticated arbitrary file read in multiple Atlassian Data Center products and carries a CVSS v4.0 score of 9.3. In environments integrated with Crowd, attackers who obtain crowd.properties can extract plaintext credentials and escalate to administrator privileges via the Crowd API. The flaw stems from improper handling of double-colon sequences in a shared web resource library, enabling path traversal against plugin resource endpoints. Affected products include Bitbucket Data Center, Confluence Data Center, Jira Software Data Center, Jira Service Management Data Center, Bamboo Data Center, Crowd Data Center, Crucible, and Fisheye. Atlassian urges immediate patching outside normal cycles and recommends WAF rules or Tomcat RewriteValve configurations to block traversal patterns. Organizations should also review access logs for double-decoded URLs containing .., /, \, or :: sequences.

Developer Releases PhishIntel Open-Source Tool for Phishing Site Analysis and Risk Scoring

A developer has published PhishIntel, a lightweight Python-based OSINT application designed to analyze domains and evaluate phishing risk. The tool performs extensive checks including domain structure analysis, DNS records, RDAP and WHOIS data, TLS certificates, HTTP redirects, page content, security headers, and JavaScript static analysis. It generates structured JSON reports containing risk scores with explanatory indicators. Optional integrations with VirusTotal, Google Safe Browsing, URLhaus, Nmap, Nuclei, ZAP, and Playwright enable reputation checks, dynamic browser analysis, and active scanning. The project aims to help identify suspicious sites used in schemes such as the recent fake fuel sales campaign that defrauded victims of at least 3.7 million rubles. The author invites feedback from security professionals to improve the codebase.