PaperCut warns that a zero-day in NG and MF is being exploited. The company already release emergency patches to address it. PaperCut Software warns that attackers are actively exploiting a zero-day in its NG and MF print management products. The flaw has no CVE yet, and the company has not released technical details. PaperCut issued emergency patches on Friday and urged customers to install them immediately. It also recommends disconnecting application servers from the internet and limiting access to trusted IP addresses. “If your PaperCut NG/MF Application Server is accessible from the public internet, immediately restrict web access to trusted IP addresses only (e.g. internal IP addresses).” states the advisory. “Use firewall rules, network access controls, or equivalent measures to ensure the PaperCut server’s web interfaces cannot be reached from untrusted internet addresses. Take this action now, even if you have not observed suspicious activity.” The company confirmed incidents affecting customers and said its investigation is still underway. “PaperCut Software security response team is investigating active exploitation of a vulnerability affecting PaperCut NG and PaperCut MF.” reads the advisory. “We are aware of confirmed customer incidents and are treating this matter with the highest priority. Our investigation is ongoing. We will update this security bulletin as verified information becomes available, including indicators of compromise and remediation guidance.” PaperCut has not yet disclosed details about the vulnerability, the attack method, or the attackers behind the campaign. So far, the company has identified several indicators of compromise: Intrusion-detection, endpoint-security, or network-monitoring tools may flag suspicious activity involving the PaperCut Application Server, especially activity linked to pc-app.exe. Attackers may delete, truncate, or alter PaperCut server.log files to hide their activity. The server.log file may contain these entries: ERROR No suitable driver found for jdbc:no:x ERROR DatabaseUtils - Database error looking up cardID: VALUES CAST Users running PaperCut should check their systems for these signs of compromise. In May 2023, Microsoft warned that Iran-linked APT groups were exploiting another flaw, tracked as CVE-2023-27350, in attacks against PaperCut MF/NG print management servers. The CVE-2023-27350 flaw is a PaperCut MF/NG Improper Access Control Vulnerability. PaperCut MF/NG contains an improper access control vulnerability within the SetupCompleted class that allows authentication bypass and code execution in the context of SYSTEM. In April 2023, Microsoft linked the attacks exploiting the CVE-2023-27350 and CVE-2023-27351 vulnerabilities in print management software PaperCut to a financially motivated threat actor tracked as Lace Tempest (formerly DEV-0950). The group is known to be an affiliate of the Clop ransomware RaaS affiliate, it has been linked to GoAnywhere attacks and Raspberry Robin infection. Since April 13, 2023, Lace Tempest added the PaperCut exploits to its arsenal. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Zero-Day)
Microsoft released the KB5120998 preview cumulative update for Windows 11 versions 25H2 and 24H2, which comes with 35 changes, including improvements to the Start menu, taskbar, and Windows search. KB5120998 is a preview update that lets IT administrators test Windows bug fixes, improvements, and new features before they roll out to all users during next month's Patch Tuesday release. However, unlike cumulative updates, monthly optional updates do not include security fixes and provide only quality improvements. After installing the August 2026 preview update, users can move the taskbar to the bottom, top, left, or right side of their screen in Settings > Personalization > Taskbar > Taskbar behaviors > Taskbar position, with most customization settings, like never combining taskbar icons, working in every position.
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Red Hat, Linux Kernel, Ajax.NET Professional, Microsoft SQL Server, and Citrix NetScaler flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: CVE-2015-3246 Red Hat Libuser Race Condition Vulnerability CVE-2015-5287 Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability CVE-2019-1068 Microsoft SQL Server Remote Code Execution Vulnerability CVE-2021-23758 Ajax.NET Professional Deserialization of Untrusted Data Vulnerability CVE-2022-0995 Linux Kernel Out-of-Bounds Write Vulnerability CVE-2026-8452 Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability CVE-2015-3246 is a race condition in Red Hat libuser that could let an authenticated local user corrupt /etc/passwd to cause denial of service or escalate privileges. CVE-2015-5287 is a privilege escalation bug in Red Hat Automatic Bug Reporting Tool that could allow local users with certain permissions to gain higher privileges via a symlink attack on a predictable file. CVE-2019-1068 is a remote code execution flaw in Microsoft SQL Server that could allow an attacker to execute code in the context of the SQL Server Database Engine service account. CVE-2021-23758 (CVSS score not specified in the KEV notice) is a deserialization of untrusted data vulnerability in Ajax.NET Professional that could allow for remote code execution via arbitrary .NET classes. CVE-2022-0995 (CVSS score not specified in the KEV notice) is an out-of-bounds memory write vulnerability in Linux Kernel that could allow a local user to gain privileged access or cause a denial of service on the system. CVE-2026-8452 (CVSS score not specified in the KEV notice) is an improper restriction of operations within the bounds of a memory buffer vulnerability in Citrix NetScaler ADC and NetScaler Gateway that could lead to denial-of-service and has been observed under active exploitation in the wild. According to Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities, FCEB agencies have to address the identified vulnerabilities by the due date to protect their networks against attacks exploiting the flaws in the catalog. Experts also recommend that private organizations review the Catalog and address the vulnerabilities in their infrastructure. CISA orders federal agencies to fix the flaws CVE-2019-1068 and CVE-2026-8452 by August 29, 2026, while the remaining must be addressed by September 9, 2026. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, CISA)
A cyberattack on Manchester Airports Group exposed data of 8.7 million customers across Manchester, Stansted, and East Midlands airports. Manchester Airports Group disclosed that an unauthorised third party accessed customer data belonging to approximately 8.7 million people across three of England’s busiest airports: Manchester, London Stansted, and East Midlands. “Manchester, London Stansted and East Midlands airports have been hit by a cyber-attack in which hackers accessed the data of about 8.7 million customers.” reads the report published by The Guardian. “The incident involved data related to “car park, lounge and fast-track bookings and in-airport wifi sign-ups”, and the hackers obtained email addresses, phone numbers, vehicle registration numbers and postcodes, said Manchester Airports Group (MAG), which operates the three hubs.” MAG says it learned about the incident on Tuesday, August 25, after attackers breached the system over the weekend. The affected data included car park bookings, lounge and fast-track security reservations, and airport Wi-Fi sign-ups. Attackers accessed email addresses, phone numbers, vehicle registration numbers, and postcodes. The system did not store bank or payment details. According to MAG, most of the 8.7 million affected customers only lost their email addresses, while the impact varies depending on which services they used. The attack did not disrupt airport operations or flights. As a precaution, MAG temporarily suspended its Manage My Booking service, but all existing reservations remain valid. Customers who need to change a booking within the next 72 hours can use a dedicated phone line. “We would urge you to be particularly cautious of unexpected emails, calls or text messages claiming to be from us. We will never contact you unexpectedly to ask for payment or banking information. We apologise for any inconvenience or concern this may cause.” reads the email sent by Stansted to affected customers. That warning is relevant because the combination of an email address, a phone number, and the knowledge that someone recently made a parking or lounge booking gives a convincing starting point for a targeted phishing message. Attackers don’t need payment data if they can impersonate the airport convincingly enough to obtain it themselves. The timing adds pressure. The attack landed during the peak summer travel season, with millions of families flying back into the UK before the school year begins. The three airports combined handled around 54 million passengers last year, and MAG recently reported a record 66 million passengers across its network. The scale of the data exposure reflects the sheer volume of ancillary services these airports sell, and how much personal data those services routinely collect. The wifi registration system is the detail worth noting: signing into airport wifi typically requires a name, email, and phone number at minimum, and that information now belongs to whoever executed this breach. MAG says it quickly contained the incident, brought in external cybersecurity experts and notified the relevant authorities. No group has claimed responsibility, and investigators have not publicly linked the attack to any specific actor. The incident adds to a growing list of cyberattacks against UK infrastructure. Earlier in August, Iran-linked hackers took a British power plant offline for four days, marking the first confirmed case of Iranian actors shutting down a UK generator. Last year, attacks disrupted production at Jaguar Land Rover and targeted Marks & Spencer, Harrods and the Co-op. Heathrow also faced flight delays and cancellations after attackers disrupted check-in and boarding systems used by several European airports. MAG’s breach adds further pressure on UK infrastructure operators to strengthen their cyber defenses. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, UK Airport Operator MAG)
Cosmos Labs has warned that a critical balance-handling flaw in the shared Cosmos EVM module was exploited to drain funds from six blockchains between August 20 and August 25, 2026. The vulnerability, designated GHSA-7g4w-cg88-2cq2, is rated Critical by Cosmos Labs and was published without a CVE identifier, a weakness classification, or a CVSS score. Affected versions are < 0.6.2 and >=
Malicious actors are exploiting a newly patched security flaw in PaperCut NG and MF to execute arbitrary code on susceptible instances, as the company released a fresh emergency fix with additional hardening. "This vulnerability gives an unauthenticated attacker remote control over PaperCut's trusted configuration, which could be used to execute arbitrary Java code inside the application's
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a critical security flaw impacting ownCloud to its Known Exploited Vulnerabilities (KEV) catalog following reports that a Chinese-speaking threat actor weaponized the vulnerability to target a nuclear research body in the Philippines. The vulnerability, tracked as CVE-2023-49105 (CVSS score: 9.8), is a case of
Cybersecurity researchers have discovered a cluster of 18 Google Chrome and one Microsoft Edge extensions that were published over the last six months and harbored wallet secret stealing and cryptocurrency draining capabilities. The extensions, per Socket security researcher Karlo Zanki, share similarities in code and tradecraft, with evidence indicating that the campaign may have been active
Security researcher Olivier Laflamme has disclosed two independent root remote code execution (RCE) chains affecting the Unitree G1 EDU, including a Bluetooth Low Energy (BLE) path that can reach root on the robot's Locomotion PC. The flaws are tracked as CVE-2026-76639 and CVE-2026-76640, with the first involving a network-adjacent path through chat_go and bashrunner and the
ServiceNow has released patches for four security flaws impacting the ServiceNow AI Platform, three of them rated 10.0 on the CVSS scoring system and exploitable, in certain circumstances, by an unauthenticated attacker. The company said it deployed a security update to hosted instances and provided the update to its partners and self-hosted customers, which leaves organizations that run their
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