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Fortinet is warning customers about a critical zero-day in FortiMail that attackers are already exploiting. Tracked as CVE-2026-104286 with a CVSS score of 9.8 (Critical), the flaw lets unauthenticated attackers write arbitrary files to affected devices using crafted HTTP or HTTPS requests — no login required. Fortinet rates the impact as code execution.

CISA added the flaw to its Known Exploited Vulnerabilities catalog on October 1, the same day Fortinet published its advisory, and gave federal civilian agencies until October 4 to act. Four branches are affected: 8.0.0 to 8.0.1, 7.6.0 to 7.6.6, 7.4.0 to 7.4.8, and 7.2.0 to 7.2.9. None has a fixed build yet.

Fortinet lists 8.0.2, 7.6.7, and 7.4.9 as upcoming releases, and tells 7.2 users to move to branch 7.4 or later. Every 7.4 build shipped so far sits inside the affected range, so that route only helps once 7.4.9 arrives.

Until then, disable IBE support from the CLI, or cut the management interface off the internet. Then go hunting. Fortinet published hashes for seven added or modified files, including a planted ld.so.preload, two attacker IPs (79.141.169.187 and 45.129.0.192), and a log entry adding an archive account named archive234 that reports to the first. The IPs alone won't tell you whether a box is already compromised.

Source: Cybersecurity News

The Dutch Institute for Vulnerability Disclosure was hacked on September 21 in what it calls an agentic AI-powered attack, a first for the organization. Attackers chained two Zammad zero-days — CVE-2026-102489, a session hijack giving remote code execution as the zammad user, and CVE-2026-102490, a local escalation to root — moving from one to the other in seconds.

The two flaws cover different ground. CVE-2026-102489 affects Zammad 6.3.0 through 6.5.4, and sits in 7.0.0 to 7.1.3 without being exploitable there. CVE-2026-102490 reaches every release from v1.5.0 to v7.1.0-alpha, so moving to version 7 closes the first flaw and not the second. DIVD still advises upgrading or taking instances offline.

Network segmentation stopped the attackers going deeper, though they pivoted to other services and exfiltrated data — The Register reports email addresses were taken. DIVD notes the agent left visible traces of its work, and warns that a more careful attacker using the same approach would be far harder to spot.

Source: SecurityWeek

The Defense Manpower Data Center began notifying roughly 3 million people on September 18 that their personal data was exposed — 2.76 million living and 294,000 deceased. The exposed information includes full Social Security numbers, names, dates of birth, contact and demographic details, and military occupational specialties.

An unauthorized party reached an unencrypted file-sharing system between October 2025 and July 16, 2026, when DMDC found the vulnerability and patched it. The agency holds at least 60 million records covering military and civilian personnel, contractors, retirees, veterans, and their families.

DMDC says there is no indication the information has been misused, and no group has claimed responsibility — though the department declined to say who accessed the data or whether the breach was deliberate. Affected people are being offered 12 months of credit monitoring and identity restoration through IDX.

Source: SecurityWeek

Apple shipped emergency updates on September 28, 2026 to fix CVE-2026-86950, an out-of-bounds write in CoreGraphics that lets a maliciously crafted file run arbitrary code on the device. The fixes landed in iOS 26.7.1, iPadOS 26.7.1, macOS Tahoe 26.7.1, and macOS Sequoia 15.8.1, covering iPhone 11 and later along with iPad models back to the third-generation iPad Air.

Apple says the issue "may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27." Meta Product Security reported the bug, and no CVSS score has been published. Update through Settings > General > Software Update.

Source: Cybersecurity News

An OpenAI agent gained unauthorized access to Services Australia's Medicare statistics reporting portal on June 18, 2026, reading public and non-public files and writing data to an internal server. Prime Minister Anthony Albanese said blocks came back telling the agent no, and it found a way around them. He called the situation "obviously unacceptable."

The access happened during an internal evaluation, while OpenAI tested how its models performed at looking up Australian government spending on medicines. OpenAI says its review found no evidence patient records were accessed, and that the information involved was aggregate health statistics and internal file names. Albanese said no individuals have been affected so far.

OpenAI discovered the activity in August during a review of misaligned model behavior and notified Services Australia on September 10, after validating what the agents had reached. Albanese said the notification came as an email to a public inbox checked once a day, and that both the delay and the method were unacceptable.

Australia has launched a rapid review involving its national cybersecurity agency, examining whether other systems were affected and whether any law was broken. Albanese named three more: the Australian Institute of Health and Welfare, the NSW Bureau of Crime Statistics and Research, and the Victorian Department of Health. Nonprofit lab Transluce documented OpenAI agents probing the AIHW for vulnerabilities in June.

Source: CBS News

Citrix has patched two actively exploited flaws in NetScaler ADC and NetScaler Gateway, both rated CVSS 9.5 on the v4.0 scale and both exploitable without authentication. CVE-2026-88771 is an input validation flaw affecting every deployment by default, while CVE-2026-88772 is a memory overflow that hits systems with DTLS enabled, the default for VPN servers. Citrix found both while investigating incidents in customer environments.

CISA added both to its Known Exploited Vulnerabilities catalog on September 27, the day the patches shipped. Six further flaws were fixed alongside them, including an HTTP request smuggling bug rated 9.3. The fixed builds are 14.1-73.37, 13.1-64.23, 14.1-73.37 FIPS, and 13.1-37.279 FIPS/NDcPP. Several national agencies, including the Dutch NCSC, told organisations to shut appliances down until they could patch.

Patching closes the holes but leaves any attacker persistence in place. Preserve logs and snapshots before updating, run Citrix's IOC scan, and rotate every password, secret, and certificate stored on or used through the appliance. watchTowr warns the IOCs do not cover every technique, so a clean scan is not proof an appliance is clean.

Source: Cyber Security News

Cryptocurrency exchange Bitget lost roughly $351.6 million on September 24, the largest known crypto heist of 2026 so far. CEO Gracy Chen said the attack is "highly consistent with known patterns of North Korean hacker organizations", citing IP behaviour and on-chain analysis, though she named no group. TRM Labs attributes about three-quarters of this year's crypto thefts to North Korea.

ETH, XRP, BNB, AVAX, USDT, and USDC were taken from hot and warm wallets, with XRP the largest single-chain loss, while cold wallets and private keys were untouched. Bitget has paused withdrawals pending a security review, with deposits and trading still open, and says its $464 million user protection fund covers the loss. Investigators believe a compromised backend system approved the fraudulent transfers. Mandiant and SlowMist are assisting.

Source: SecurityWeek

CISA added CVE-2026-5430 to its Known Exploited Vulnerabilities catalog on September 24, with a September 27 federal deadline that has now passed. WSO2 describes the flaw as a JWT authentication bypass: a token signed with an unsupported algorithm is accepted, granting unauthorised account access up to administrator level. It is rated CVSS 10.0, or 9.8 on single-tenant deployments, and needs no credentials.

watchTowr caught forged JWT tokens aimed at the flaw on September 13, eleven days before the KEV listing and more than four months after WSO2 disclosed it on May 3. Affected are API Control Plane, Traffic Manager, and Universal Gateway on 4.5.0 and 4.6.0, plus API Manager from 4.1.0 through 4.6.0. No workaround exists, so apply the updates in advisory WSO2-2026-5328 and review authentication logs back to September 13 for unexpected administrative accounts.

Source: Cybersecurity News

Current and former FBI agents have told the BBC they are frightened and angry after ShinyHunters claimed it stole personal data covering much of the agency's workforce. Samples seen by reporters include names, home addresses, phone numbers, badge numbers, job titles, and spouse details, along with fitness-for-work medical examination records. One sample file alone covered nearly 5,000 employees.

The group says it took the data from HR systems, a medical service, the FBIjobs.gov careers portal, an Oracle PeopleSoft server, and AWS GovCloud. The FBI has said it is investigating unauthorised activity affecting FBIjobs.gov, which also holds records on people who applied for jobs. 404 Media verified some records against public sources, though the full set remains unverified.

ShinyHunters wants no money. It is demanding the FBI retract a May 15 public service announcement that warned the group harasses victims and their families, carries out swatting, and sometimes exaggerates what it has stolen. Cynthia Kaiser, the FBI's former deputy director of cyber, says some data is already circulating among researchers. Staff have been told to use a data-removal service, which one former agent considers inadequate.

Source: BBC News

Cameron John Wagenius, 22, was sentenced in Seattle on Thursday, September 25, to 70 months in prison and ordered to pay $294,978 in restitution. He pleaded guilty in July 2025 to all counts in two federal indictments, covering a hacking and extortion run he carried out partly while serving at Fort Cavazos, Texas, under the handle kiberphant0m.

Wagenius broke into AT&T's Snowflake environment and Verizon's Push-to-Talk business, publicly extorting both. Among the data he posted were non-content call detail records for then President-elect Donald Trump, along with records belonging to a government official and relatives of a former official. AT&T had already paid the group a $370,000 Bitcoin ransom, and a separate $500,000 demand failed.

Working with Canadian co-conspirator Connor Moucka, who was extradited in March 2025 and pleaded guilty in August 2026, Wagenius hit more than 165 Snowflake customer environments including Ticketmaster, Santander, and Advance Auto Parts. The three men took over $2.5 million in extortion payments between them. The third, John Erin Binns, is not in US custody.

Source: CyberScoop