Cisco Says Ransomware Group’s Leak Related to Old Hack
A fresh post on the Kraken ransomware group’s leak website refers to data stolen in a 2022 cyberattack, Cisco says. The data, a list of credentials apparently exfiltrated from Cisco’s systems, appeared over the weekend on a new data leak site operated by the Kraken ransomware group. “Cisco is aware of certain reports regarding a security incident. The incident referenced in the reports occurred back in May 2022, and we fully addressed it at that time,” a Cisco spokesperson said, responding to a SecurityWeek inquiry.
RedMike (Salt Typhoon) Exploits Vulnerable Cisco Devices of Global Telecommunications Providers
Between December 2024 and January 2025, Recorded Future’s Insikt Group identified a campaign exploiting unpatched internet-facing Cisco network devices primarily associated with global telecommunications providers. Victim organizations included a United States-based affiliate of a United Kingdom-based telecommunications provider and a South African telecommunications provider. Insikt Group attributes this activity to the Chinese state-sponsored threat activity group tracked by Insikt Group as RedMike, which aligns with the Microsoft-named group Salt Typhoon. Using Recorded Future® Network Intelligence, Insikt Group observed RedMike target and exploit unpatched Cisco network devices vulnerable to CVE-2023-20198, a privilege escalation vulnerability found in the web user interface (UI) feature in Cisco IOS XE software, for initial access before exploiting an associated privilege escalation vulnerability, CVE-2023-20273, to gain root privileges. RedMike reconfigures the device, adding a generic routing encapsulation (GRE) tunnel for persistent access.
Critical Cisco ISE bug can let attackers run commands as root
Cisco has fixed two critical Identity Services Engine (ISE) vulnerabilities that can let attackers with read-only admin privileges bypass authorization and run commands as root.
Live Chat Blog #2: Cisco Webex Connect - Access to millions of chats histories
In July 2024, we identified a vulnerability that resulted in access to millions of live customer support messages for organizations using Cisco Webex Connect.
Cisco warns of continued exploitation of 10-year-old ASA bug
Cisco on Dec. 2 updated an advisory from March 18 about a 10-year-old vulnerability in the WebVPN login page of Cisco’s Adaptive Security Appliance (ASA) software that could let an unauthenticated remote attacker conduct a cross-site scripting (XSS) attack. In its recent update, the Cisco Product Security Incident Response Team (PSIRT) said it became aware of additional attempted exploitation of this vulnerability in the wild last month.
China-linked APT group Salt Typhoon compromised some US ISPs
China-linked threat actors compromised some U.S. internet service providers as part of a cyber espionage campaign code-named Salt Typhoon. The state-sponsored hackers aimed at gathering intelligence from the targets or carrying out disruptive cyberattacks. The Wall Street Journal reported that experts are investigating into the security breached to determine if the attackers gained access to Cisco Systems routers, which are core network components of the ISP infrastructures.
Cisco warns of backdoor admin account in Smart Licensing Utility
Cisco has removed a backdoor account in the Cisco Smart Licensing Utility (CSLU) that can be used to log into unpatched systems with administrative privileges.
Critical Cisco bug lets hackers add root users on SEG devices
Cisco has fixed a critical severity vulnerability that lets attackers add new users with root privileges and permanently crash Security Email Gateway (SEG) appliances using emails with malicious attachments. Tracked as CVE-2024-20401, this arbitrary file write security flaw in the SEG content scanning and message filtering features is caused by an absolute path traversal weakness that allows replacing any file on the underlying operating system.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Cisco: Hacker breached multifactor authentication message provider on April 1
Cisco said one of the providers it uses to send multifactor authentication (MFA) messages was breached by a threat actor on April 1. In emails to customers, Cisco said the incident specifically affected Duo — a multifactor authentication company it acquired in 2018. The attacker breached the system of a telephony supplier that Duo uses to send MFA messages through texts and phone calls to its customers.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Cisco discloses new IOS XE zero-day exploited to deploy malware implant
Cisco disclosed a new high-severity zero-day (CVE-2023-20273) today, actively exploited to deploy malicious implants on IOS XE devices compromised using the CVE-2023-20198 zero-day unveiled earlier this week.
Active exploitation of Cisco IOS XE Software Web Management User Interface vulnerability
Cisco has identified active exploitation of a previously unknown vulnerability in the Web User Interface (Web UI) feature of Cisco IOS XE software (CVE-2023-20198) when exposed to the internet or untrusted networks.
Comprehensive Threat Intelligence: Cisco Talos shares insights related to recent cyber attack on Cisco
On May 24, 2022, Cisco became aware of a potential compromise. Since that point, Cisco Security Incident Response (CSIRT) and Cisco Talos have been working to remediate. * During the investigation, it was determined that a Cisco employee’s credentials were compromised after an attacker gained control of a personal Google account where credentials saved in the victim’s browser were being synchronized.
Dump these Cisco phone adapters because it's not fixing them
There is a critical security flaw in a Cisco phone adapter, and the business technology giant says the only step to take is dumping the hardware and migrating to new kit. In an advisory, Cisco this week warned about the vulnerability in the SPA112 2-Port Adapter that, if exploited, could allow a remote attacker to essentially take control of a compromised device by seizing full privileges and executing arbitrary code. The flaw, tracked as CVE-2023-20126, is rated as "critical," with a base score o
Cisco discloses high-severity IP phone zero-day with exploit code
Cisco has disclosed today a high-severity zero-day vulnerability affecting the latest generation of its IP phones and exposing them to remote code execution and denial of service (DoS) attacks.
Cisco confirms May attack by Yanluowang ransomware group
Cisco confirmed on Wednesday that it was attack by the Yanluowang ransomware group in May, but said the hackers were not able to steal sensitive data or impact the company’s operations. In a statement to The Record, Cisco said the incident occured on their corporate network in late May and that they “immediately took action to contain and eradicate the bad actors.”
