Cyber Threat Intel Daily Briefing — 2026-09-05

CYBER THREAT INTEL

DAILY BRIEFING · 2026-09-05 19:25 UTC · REPORT BRIEF-20260905-192537

OPEN // LE

01

Over 5,400 hacked sites serve ClickFix payloads stored on the blockchain

A massive cybercriminal operation is leveraging thousands of compromised small-business websites to deliver ClickFix payloads stored in smart contracts on the BNB Smart Chain (BSC). […].

high SRC: BleepingComputer Sat, 05 Sep 2026 10:29:13 -0400 https://www.bleepingcomputer.com/news/security/over-5-400-hacked-sites-serve-clickfix-payloads-stored-on-the-blockchain/

02

Trezor Says ShipMonk Breach Exposed 67,000 U.S. Customers' Data It Said Was Deleted

Hardware wallet manufacturer Trezor on Friday disclosed that another 67,000 customers from the U.S. have been impacted in a breach at its shipping provider ShipMonk. The exposed information includes customer names, email addresses, phone numbers, shipping addresses, and order numbers between November 2019 and August 2021. The breach does not affect the security of the company's hardware wallets.

critical SRC: The Hacker News Sat, 05 Sep 2026 19:47:02 +0530 https://thehackernews.com/2026/09/trezor-says-shipmonk-breach-exposed.html

03

OpenAI admits it didn't disclose rogue AI wiki hijacking incident

OpenAI admits it did not disclose an incident where autonomous AI agents hijacked a German wiki, created 18,000 posts, shared answers, and bypassed restrictions, saying it treated the activity as model "misalignment" rather than a security breach. […].

critical SRC: BleepingComputer Sat, 05 Sep 2026 07:11:50 -0400 https://www.bleepingcomputer.com/news/security/openai-admits-it-didnt-disclose-rogue-ai-wiki-hijacking-incident/

04

Thousands of OpenAI Agents Quietly Turned an Abandoned Wiki Into Their Coordination Channel

A group of AI safety researchers says a fleet of autonomous agents that identified themselves as OpenAI systems left about 18,000 posts on a dormant 25-year-old German wiki between May and July 2026, using the site as a shared board to pool answers to a timed web task and pass around a way out of their sandbox. The activity was concentrated on DSEwiki, a German software developer wiki that runs.

medium SRC: The Hacker News Sat, 05 Sep 2026 13:25:10 +0530 https://thehackernews.com/2026/09/thousands-of-openai-agents-quietly.html

05

Attackers Exploit PaperCut Flaws to Steal Credentials From Schools and Universities

Threat actors are exploiting the newly disclosed PaperCut flaws to facilitate credential theft in attacks targeting the education sector in the U.S. and Europe. The Arctic Wolf Adversary Research Team said it observed attackers exploiting CVE-2026-81578 and CVE-2026-82078 – an authentication bypass and remote code execution chain – to conduct command execution and reconnaissance, as well as.

critical SRC: The Hacker News Sat, 05 Sep 2026 13:01:53 +0530 https://thehackernews.com/2026/09/attackers-exploit-papercut-flaws-to.html

06

IDScan sued over alleged data breach affecting 153 million drivers

Multiple lawsuits have been filed against identity verification company IDScan after hackers allegedly breached the service and offered to sell more than 153 million driver's licenses. […].

critical SRC: BleepingComputer Fri, 04 Sep 2026 12:56:45 -0400 https://www.bleepingcomputer.com/news/security/idscan-sued-over-alleged-data-breach-affecting-153-million-drivers/

07

Phishing Campaign Sends Millions of Emails Using Invisible Unicode to Evade Filters

Microsoft is alerting of a "high-volume phishing campaign" that's using invisible Unicode tag characters to bypass email filters. "Instead of using these characters to hide instructions from people while exposing them to AI models, the attacker used them to split financial lure words such as 'funding' to prevent email filters from parsing them," the Microsoft Security Research team said. The.

high SRC: The Hacker News Fri, 04 Sep 2026 21:27:15 +0530 https://thehackernews.com/2026/09/phishing-campaign-sends-millions-of.html

08

Critical Citrix NetScaler auth bypass now leveraged in attacks

Attackers have begun targeting a critical-severity Citrix NetScaler auth bypass flaw (CVE-2026-19490) in the wild, according to vulnerability intelligence company Previdian. […].

critical SRC: BleepingComputer Fri, 04 Sep 2026 11:25:59 -0400 https://www.bleepingcomputer.com/news/security/hackers-target-critical-citrix-netscaler-auth-bypass-in-attacks/

09

PostgreSQL Fixes 12-Year-Old Logical Decoding Flaw Enabling Replication-Role Code Execution

PostgreSQL has released updates to address a security flaw that allows an account with the REPLICATION attribute to run arbitrary code as the operating-system user running the database server. The flaw, tracked as CVE-2026-6471 (CVSS score: 7.2), has been present since logical decoding was introduced in PostgreSQL 9.4 in 2014. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are.

high SRC: The Hacker News Fri, 04 Sep 2026 20:50:19 +0530 https://thehackernews.com/2026/09/postgresql-fixes-12-year-old-logical.html

10

New Ted Backdoor Hides Inside Victims' Own HAProxy Builds to Intercept Web Traffic

A previously undocumented Linux toolkit has been found compiled directly into the trojanized HAProxy load balancers of two South Korean organizations, where it intercepted web traffic and served altered pages to selected visitors. The attackers named the implant ted in debug strings left in the binary. It is not a HAProxy vulnerability, and installing it requires code execution on the host and.

critical SRC: The Hacker News Fri, 04 Sep 2026 20:21:13 +0530 https://thehackernews.com/2026/09/new-ted-backdoor-hides-inside-victims.html