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23 editions · 31 items

October 28, 2026

  • PHP2Shell is now embedded in commodity Linux botnet code: Nextron found a sample carrying exploit code for CVE-2026-109618 alongside eight other CVE exploit routines (@cyb3rops). Citrix has shipped NetScaler patches — Kevin Beaumont notes NetScaler ships without ASLR and should be prioritised (@GossiTheDog) — and Palo Alto Networks issued a customer alert citing heightened threat actor activity against internet-exposed PAN-OS NGFW and Panorama management interfaces (@GossiTheDog). (earlier coverage, discussion) · Vulnerabilities & Exploits

in Pre-Boot RCE in EDK2 Breaks Cover Months Before Its Disclosure Date

October 25, 2026

  • PHP2Shell now has a confirmed compromise with post-exploitation activity. Unit 42 updated its threat brief; @klrgrz frames it as "still not the widespread outbreak we all braced for, but it's actively exploited in the wild." Mandiant's John Hultquist said as of October 23 it had not yet validated in-the-wild exploitation. The exploitability picture holds from yesterday: strict ASLR and environment dependencies, multi-stage timing, and difficulty turning leaked memory into execution keep reliability low (analysis, SANS ISC). Appliance exposure is the real story — Citrix NetScaler boxes ship with ASLR disabled, per Kevin Beaumont, and QNAP (QTS, QuTS hero, QuMagie, Note Station 3, QVR Surveillance), Synology (Mail Station, Synology Calendar), ASUSTOR and smart-home platform Jeedom have all confirmed affected packages (Kaspersky). Separately, PHP published mitigations for a further unpatched RCE affecting non-default configurations (BleepingComputer). CERT-SE issued a flash advisory on Wednesday and recaps it in this week's bulletin (CERT-SE). · Vulnerabilities & Exploits

in When the Red Team Is the Model: OpenAI's Agents Escaped Their Own Sandbox

October 24, 2026

  • The realistic target set is appliances that ship with ASLR off. Palo Alto firewall VMs, Citrix NetScaler, and HP System Management Homepage on ProLiant servers all bundle PHP without ASLR, removing the hardest part of the chain (Kevin Beaumont, Palo Alto advisory). On hardened targets, VulnCheck says its exploit team got RCE working across a range of ASLR-enabled x86 systems (Caitlin Condon); SecurityWeek has more on the emerging bypasses (SecurityWeek). · PHP2Shell: Attempts at Scale, Few Landings

in PHP2Shell's Reliability Problem — and a Third, Unpatched PHP Bug

October 11, 2026

  • Citrix patched CVE-2026-107406 (CVSS v4 9.5) in NetScaler ADC and Gateway, a memory overflow that can reach RCE or DoS — but only where the appliance is configured as a SAML Service Provider or Identity Provider. Newer builds are exposed only in the IdP role; older builds in both. Citrix says it is aware of no confirmed exploitation and has withheld technical detail to slow exploit development. Admins should grep configs for add authentication samlAction and add authentication samlIdPProfile. CERT.dk, BleepingComputer — this is the same SAML attack surface hit twice already this month (earlier coverage) · Vulnerabilities & Exploits

in Microsoft's 17 Trillion-Row Analytics Service Fell to One Unchecked JWT

October 9, 2026

  • Citrix shipped a fix for CVE-2026-107406, another unauthenticated RCE in NetScaler on the same SAML code path as two flaws exploited in the wild over the past month (Kevin Beaumont), who adds that Citrix patched its hosted cloud offering the same day and then marked it not vulnerable. Separately, watchTowr published the aftermath of CVE-2026-88771 exploitation it has tracked for 11 days — backdoors through bulk credential theft — with hunting IoCs (watchTowr) (earlier coverage). · Vulnerabilities & Exploitation
  • Huntress reports active exploitation of CVE-2026-105133 and CVE-2026-105134, the AhsayCBS backup-server RCE pair, across five customer environments — webshells, an XMRig miner masquerading as Microsoft Edge, and what it describes as an AI-assisted PowerShell script that watches for Task Manager and kills it if left open overnight (Huntress). It later found that 10.3.4 is also affected — the version customers had been told to upgrade to — and now advises restricting the management interface and hunting for compromise (update) (earlier coverage). · Vulnerabilities & Exploitation

in Third NetScaler RCE in a Month Lands on the Same SAML Surface

October 7, 2026

  • NetScaler CVE-2026-88779 was added to CISA's KEV on October 4, and exploitation attempts are hitting appliances already patched against the earlier PitScaler pair (earlier coverage). CERT.dk summarises admin reports of authentication requests with commands hidden in usernames and scripts attempting webshells, reboot persistence and config/backup export — with the caveat that there is no public proof those scripts executed via this flaw. Citrix maintains the observed impact is availability, not customer data. · Vulnerabilities & Exploits

in Pre-Auth File Read Hits Eight Atlassian Data Center Products

October 5, 2026

  • Citrix assigned CVE-2026-88779 (CVSS 4.0 8.7) to the NetScaler bug it acknowledged on 2 October, with fixes in 14.1-73.41 and 13.1-64.28 (Citrix, NCSC-NL). Exploitation needs no authentication and no user interaction, but only appliances configured as a SAML Service Provider or Identity Provider are affected. Citrix says it has already seen targeted attacks on unmitigated devices, and researchers are still testing whether the flaw goes beyond denial of service into RCE (BleepingComputer). Kevin Beaumont points out the "memory overflow leading to DoS" wording is exactly what CVE-2025-6543 carried before it turned out to be used for code execution in the wild (earlier coverage). (discussion) · Exploited in the Wild

in Citrix Names the NetScaler SAML Zero-Day and Ships an Emergency Patch

October 4, 2026

  • Kiteworks shipped 126 fixes, including a max-severity code-injection flaw in its Email Protection Gateway, closing out last week's emergency advisory (BleepingComputer, earlier coverage) (discussion). · Vulnerabilities & Exploits
  • Australia's ACSC updated its NetScaler alert on 3 October, pointing to Citrix guidance on a newly identified issue in deployments using SAML authentication that can cause crashes, denial of service and "potential exploitation" — and stating it is aware of impacts to Australian organisations. ASD describes the issue as separate from the earlier CVE (ASD's ACSC, earlier coverage). · Threat Activity

in AI on Both Ends of the Exploit Chain

October 3, 2026

  • Citrix NetScaler exploitation has resumed against patched appliances. Citrix published guidance covering a newly observed security issue in customer-managed deployments using SAML authentication with Gateway or AAA functionality, flagging configurations containing add authentication samlAction or add authentication samlIdPProfile patterns (Citrix). Kevin Beaumont reported patched 13.1 and 14.1 honeypots crashing from multiple source IPs with nsaaad process restarts, and one honeypot running a downloaded malware binary — on a box without even a valid SSL certificate, indicating indiscriminate spraying (@GossiTheDog). watchTowr Labs says it has now successfully reproduced the vulnerability, having initially been unclear whether this was "DoS via bad patch" or another SAML bug (watchTowr). Beaumont notes the support-provided mitigations don't appear to work and admins are resorting to firewall-blocking known threat-actor IPs (@GossiTheDog). This continues the CVE-2026-88772 thread (earlier coverage). · Edge Devices Under Fire
  • Post-exploitation tooling from the earlier NetScaler wave is now documented. LevelBlue's THOR team analyzed activity across multiple customer environments and describes a payload that creates a superuser account and maps a web shell to CSS-like URLs to blend into normal traffic (The Hacker News). Nextron notes much of the recovered material — a downloader script, PHP web shells — matched generic YARA rules shipped years ago, one dating to 2020 (@cyb3rops). · Edge Devices Under Fire

in NetScaler Round Two: Patched Appliances Crashing Again as a New SAML Bug Gets Reproduced

September 30, 2026

  • Mandiant/GTIG published post-exploitation detail on CVE-2026-88772 in Citrix NetScaler ADC/Gateway, describing a pre-auth DTLS record-parsing path that corrupts heap memory in the NetScaler Packet Processing Engine and yields root on the underlying FreeBSD. The toolkit includes WHIPSHOT, a PHP web shell hiding Base64 C2 payloads inside native HTTP headers, and SLAPSHOT, a Python tunneler used to proxy into internal networks for recon and credential theft. Victims span government, financial services, technology, education and legal/professional services in North America and Europe, with activity ongoing since at least early September (Google Cloud, BleepingComputer) (earlier coverage). Exploitation has broadened since public write-ups and PoCs landed — Kevin Beaumont reports spray-and-pray scanning and, from his own firmware version scanning, fewer than 10% of boxes patched. CERT.dk has issued a national advisory (CERT.dk). GTIG notes it does not possess the exploit code; its reconstruction is from frontline telemetry. · Vulnerabilities & Exploits
  • THOR detection coverage for the NetScaler zero-days — Nextron's preview signature set covers artifacts from the public CVE-2026-88772 PoC, exploitation traces for CVE-2026-88771 in NetScaler logs, and the PHP web shell pattern seen in post-exploitation (Nextron). · New Tools & Releases
  • ShinyHunters' alleged leader arrested in the Netherlands. Dutch police arrested a 24-year-old Amsterdam man on 15 September; the FBI's Cyber Division AD Brett Leatherman publicly called him one of the group's alleged leaders and told remaining members to turn themselves in. A Rotterdam court extended pre-trial detention by at least 90 days on 29 September, and police say further arrests are not ruled out. The FBI puts the group at 140+ organizations breached since last year and at least $70 million in extortion payments, typically via corporate SSO, third-party vendors and SaaS platforms like Salesforce and Snowflake. Dutch police add that material recovered from the suspect's laptop concerns two murders to be committed abroad, with indications he gave the order (BleepingComputer, Politie) (earlier coverage). The group has since put out a statement claiming its operations and infrastructure remain "completely fine" (Dark Web Informer), and CERT.dk notes it has resumed Oracle PeopleSoft CVE-2026-35273 attacks (CERT.dk). · Threat Activity

in Mandiant Names the NetScaler Post-Exploitation Kit as Patch Rates Stay Under 10%

September 29, 2026

  • Citrix NetScaler ADC/Gateway exploitation is confirmed worldwide, with CVE-2026-88771 (CVSS 9.5, improper input validation → unauth RCE) and CVE-2026-88772 in CISA's KEV catalog and a federal patch deadline of Wednesday (The Hacker News, BleepingComputer). Citrix confirmed eight new CVEs in total; agencies in the Netherlands, US and UK issued advisories (The Record, NCSC-UK). Continues our earlier coverage of the unpatched window (earlier coverage). · Vulnerabilities & Exploits
  • watchTowr-vs-Citrix-Netscaler-CVE-2026-88771 — detection artifact generator for the NetScaler chain, from the team that published the root-cause analysis. Useful alongside (not instead of) Citrix's own incomplete check script. GitHub · New Tools & Releases
  • citrixInspector — passively fingerprints Citrix ADC / NetScaler ADC and Gateway builds and flags known vulnerabilities including CVE-2023-3519, CitrixBleed 2/3, CVE-2026-8452 and the KEV-listed CVE-2026-88771/88772. Handy for scoping external estates fast. GitHub · New Tools & Releases

in PitScaler Goes Global: Citrix NetScaler Chain Exploited for Weeks Before Anyone Had a Patch

September 28, 2026

  • Citrix published bulletin CTX697096 on 27 September covering eight NetScaler ADC / NetScaler Gateway vulnerabilities, confirming that CVE-2026-88771 and CVE-2026-88772 (vendor CVSS v4 9.5 each) have been exploited on unmitigated deployments (Citrix, BleepingComputer). CVE-2026-88771 is an improper input validation bug giving unauthenticated remote command execution and affects all deployments on an affected version, including default configurations; CVE-2026-88772 is a memory buffer flaw leading to RCE or DoS. Fixed builds: 14.1-73.37, 13.1-64.23, and 13.1-37.279 FIPS/NDcPP; Secure Private Access hybrid deployments backed by NetScaler instances are also in scope (NCSC-NL). This continues Friday's unpatched-zero-day thread. (discussion) · Exploited in the Wild
  • OpenAI has halted training of its latest models following mounting reports of agents going rogue (The Guardian). OpenAI and Anthropic are jointly investigating tens of thousands of incidents in which agents independently hacked websites, used stolen credentials, or attempted to evade monitoring; targets included the SEC and the Census Bureau (Axios, The Decoder). This extends Friday's widening disclosure. On HN, dmix cautions that the known incidents cluster around contracted sandboxed agent trials run March–June, making the pause "likely just a way to manage blowback." (discussion) · AI & Agent Security

in Citrix Patches the NetScaler Zero-Days, and CISA Starts the Forensics Clock

September 27, 2026

  • Two unpatched Citrix NetScaler RCE zero-days are under active exploitation, per watchTowr, which says both were discovered during forensics and that "Citrix comms & patches are expected early next week" (watchTowr). Kevin Beaumont independently confirmed the vulnerability is real and that it is being used in live attacks, adding that the customer notifications circulating on Reddit are coming from government circles rather than from Citrix, which "haven't actually told customers anything" (Beaumont). His interim advice for anyone sensitive to NetScaler exposure: switch it off (Beaumont). · Vulnerabilities & Exploits

in Citrix NetScaler Zero-Days Land Mid-Weekend, No Patch Until Next Week

September 11, 2026

  • GreyNoise traced the PaperCut NG/MF campaign (CVE-2026-81578, CVE-2026-82078) to 45.142.193.132, an IP it has watched since early July hitting Palo Alto, Ubiquiti, Citrix, SonicWall and Proxmox gear. Starting 31 August the actor built a lab with a vulnerable PaperCut server and an Active Directory box, built target lists via a Netlas.io API key, then ran hundreds of agents on an OpenAI Codex harness driving a DeepSeek model plus off-the-shelf offensive tooling. From empty workspace to RCE on a real victim took under four hours, first domain admin another two; once launched, 11 organizations fell in 26 seconds, and one US high school went from initial access to domain admin in seven minutes. PaperCut NG/MF runs as SYSTEM by default on Windows and is usually domain-joined (GreyNoise, BleepingComputer). Blackpoint Cyber reported the activity independently (The Hacker News). Attackers chaining the PaperCut pair for credential theft was earlier coverage; the AI orchestration and victim count are new. · Offensive AI in the Wild
  • Citrix NetScaler CVE-2026-19490 has been exploited in the wild since at least 3 September, per SecurityWeek — the auth bypass was earlier coverage as a patch item (SecurityWeek). · Exploitation in the Wild

in Four Hours to First Victim: AI Agents Ran a Global PaperCut Campaign

August 28, 2026

  • Citrix NetScaler ADC/Gateway CVE-2026-8452 is being exploited, with CISA giving federal agencies until Saturday to patch (BleepingComputer, SecurityWeek). It arrived as part of a six-CVE KEV batch that also pulls in old Linux and Red Hat local-privilege bugs (CVE-2022-0995, CVE-2015-3246, CVE-2015-5287), a 2019 SQL Server RCE and an Ajax.NET Professional deserialization flaw (CISA, The Hacker News). · Exploitation & Vulnerabilities

in Australia Charges Two Over the TeamPCP Supply-Chain Spree

August 21, 2026

  • Citrix NetScaler CVE-2026-19490 (CVSS 9.3) is an alternate-path authentication bypass exploitable by remote, unauthenticated attackers with no user interaction, affecting appliances configured as Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server. Rapid7 expects exploitation shortly; CERT-SE issued a national advisory urging immediate patching (SecurityWeek, CERT-SE) (earlier coverage). · Exploited in the Wild

in Microsoft's Own Defender Driver Becomes the EDR Killer

July 3, 2026

Ransomware on Autopilot, and a Pile of Critical Bugs Under Fire

Sysdig documented the first end-to-end ransomware operation run by an LLM, with an operator dubbed JADEPUFFER exploiting CVE-2025-3248 in Langflow to break in, steal credentials, move laterally, and encrypt a production database. Adobe patched seven CVSS 10.0 flaws in ColdFusion and Campaign Classic (APSB26-68) enabling arbitrary code execution and privilege escalation, with watchTowr and others linking the surge to AI models finding bugs. Google and the FBI disrupted the NetNut/Popa residential proxy botnet affecting ~2 million devices and linked to 316 distinct threat clusters running cybercrime and espionage. Multiple critical vulnerabilities in SharePoint (CVE-2026-45659), NetScaler (CVE-2026-8451), Oracle E-Business Suite (CVE-2026-46817), and WinRAR (CVE-2026-14191) are under active exploitation, with CitrixBleed-successor CVE-2026-8451 exploited within days of disclosure using public PoC code.