Vulnerability | Breaking Cybersecurity News | The Hacker News

Attackers are exploiting a critical flaw in Cisco Secure Email Gateway that lets a sender with no login write files to the appliance's operating system, Cisco  said in an advisory  on Wednesday. The attacker sends an email with a crafted attachment through the gateway and, if it succeeds, could then run commands as root. The appliance filters an organization's email for spam, malware, and other threats, and only a gateway with the File Reputation service enabled and a Content Scanner Tools package older than version 25.3.0.5525 is vulnerable. The fix has been shipping since September 14 in AsyncOS 15.5.5-014 and 16.5.0-780, the builds Cisco listed as fixed in a hardening release that day, which the company now says covered this flaw. It also arrives as a Content Scanner Tools update, version 25.3.0.5525 or later, which installs without a software upgrade or a restart. Cisco found the flaw, tracked as CVE-2026-76519 (CVSS score: 9.8), in its own internal security scanni...

Attackers exploited a flaw in an optional Nextcloud app,  Collabora Online - Built-in CODE Server , to plant web shells on Nextcloud servers. Three administrators  reported the issue on GitHub , with the first logged attack on September 10. A web shell is a small file that executes any command an attacker sends via a web request, with the rights of the web server account. The flaw allows an unauthenticated request to run a command on the server, but only when the app's local document server is not running, such as during a restart or upgrade, or after a crash. Collabora fixed it in  version 26.4.303  on September 11 and on October 14 published  an advisory  with the identifier  CVE-2026-110447 , warning that turning off the app does not help: it must be updated or removed. Who Is Affected The app, published by Collabora under the package name richdocumentscode, downloads a copy of Collabora Online Development Edition (CODE) and runs it ...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday urged organizations to take steps to immediately update their Ivanti Connect Secure (ICS) appliances and deployments to the latest version following the disclosure of an actively exploited vulnerability. The security flaw, tracked as CVE-2026-104935 (CVSS score: 8.6), is a case of authentication bypass impacting ICS versions 25.1.1.1 and prior, 25.1.2.2 and prior, and 22.8R2.4 and prior that could allow a remote unauthenticated attacker to execute arbitrary commands. "CISA is aware of cyber threat actors exploiting this zero-day authentication bypass vulnerability, which allows remote, unauthenticated execution of arbitrary commands, to conduct credential theft and data exfiltration," the agency said .  The agency has since added the flaw to its Known Exploited Vulnerabilities ( KEV ) catalog, requiring Federal Civilian Executive Branch (FCEB) agencies to apply the fixes by October 16, 2026. ...

A flaw in how curl handles HTTP/2 uploads lets a malicious server receiving an upload corrupt the client's memory, and the researcher who reported it turned that into code execution on the uploading machine. The curl project fixed it on October 14 in  curl 8.23.0 . Taking over a client needs exact knowledge of its build and memory layout, and curl expects a real attack to end in a crash instead. The flaw, a use-after-free tracked as  CVE-2026-92392 , affects curl and libcurl 8.12.0 through 8.22.0, both the command-line tool and the library that many other programs use for transfers. curl rates it High on its own four-level scale, its first High-severity flaw since the  SOCKS5 heap overflow of October 2023 . The project cut its release cycle by two weeks to ship the fix. The attack runs from the server side. The client has to upload a file of roughly 135KB over HTTP/2 to a server controlled by the attacker, and the server's certificate must pass the client's checks....

A team at security firm XBOW chained three then-unknown Google Chrome bugs into a single attack that runs code on a Windows computer when the user only loads a web page, the company said. Its researchers built the attack in six days by directing AI agents running OpenAI's publicly available GPT-5.6 Sol model. Google has since confirmed all three bugs,  fixed them , and paid XBOW its top $250,000 reward for a full Chrome exploit. The attack is a full chain: a set of bugs used together to break every layer of Chrome's protection, from a web page all the way to the computer. Chrome runs web page code inside two nested sandboxes, the barriers that stop a hacked page from reaching the rest of the machine. The chain crossed both. The result was code running outside Chrome on Windows, with no need for the user to click or download anything. All three bugs are now fixed, and XBOW says they were never used against Chrome users. The two that carry public identifiers were fixed ...