Cisco Snort 3 Vulnerability Leading to Sensitive Data Disclosure - gbhackers.com

Cisco Snort 3 Vulnerability Leading to Sensitive Data Disclosure Ciscocyber securityCyber Security News 2 min.Read Cisco Snort 3 Vulnerability Leading to Sensitive Data Disclosure By Mayura Kathir January 8, 2026 Share Facebook Twitter Pinterest WhatsApp Cisco has disclosed two critical vulnerabilities in the Snort 3 detection engine affecting multiple enterprise security products, including firewalls, threat defense systems, and edge platforms. The vulnerabilities, tracked as CVE-2026-20026 and CVE-2026-20027 under advisory cisco-sa-snort3-dcerpc-vulns-J9HNF4tH, could allow unauthenticated remote attackers to leak sensitive information or cause denial-of-service conditions by disrupting packet inspection capabilities. The vulnerabilities stem from improper buffer handling logic when processing Distributed Computing Environment Remote Procedure Call (DCE/RPC) requests. The first vulnerability, CVE-2026-20026, involves a buffer use-after-free condition that could enable attackers to trigger unexpected engine restarts, interrupting critical packet inspection operations. The second, CVE-2026-20027, exploits an out-of-bounds read vulnerability that permits attackers to extract sensitive information from the Snort 3 data stream. Both vulnerabilities carry a Medium severity rating, with CVSS base scores of 5.8 and 5.3, respectively, indicating network-accessible attack vectors requiring no authentication or user interaction. The vulnerability exposure extends across Cisco’s extensive security portfolio. Open Source Snort 3 deployments require immediate patching to version 3.9.6.0. Cisco Secure Firewall Threat Defense (FTD) systems running Snort 3 face exposure; notes new FTD installations from version 7.0.0 onward run Snort 3 by default, while upgraded systems from earlier releases continue running Snort 2. Cisco IOS XE-based security products, including the Catalyst 8000 and 8500 series edge platforms and Integrated Services Routers, are affected if the optional Unified Threat Defense module is installed and enabled. Cisco Snort 3 Vulnerability Additionally, Cisco Meraki MX series appliances across various models from the MX67 through the MX600 and virtual variants remain vulnerable until patches scheduled for February 2026 are applied. Exploitation requires attackers to send a large volume of crafted DCE/RPC requests through an established connection monitored by Snort 3. Comprehensive fixes: Snort 3.9.6.0 for open-source deployments, hotfixes for FTD versions 7.0 and 7.2 available through the Software Center, and updates for Cisco IOS XE scheduled for version 26.1.1 in February 2026. While this represents a meaningful technical barrier compared to more straightforward attacks, the ability to leak sensitive information or turn off inspection mechanisms poses significant risk to network defense. Cisco explicitly notes that no workarounds currently exist to mitigate these vulnerabilities, mandating software updates as the sole remediation path. Organizations running affected products should consult Cisco’s Software Checker tool to identify exposure and prioritize patch deployment. The Cisco Product Security Incident Response Team confirms no active exploitation or public disclosure at the time of advisory publication, providing a window for orderly remediation across affected infrastructure. Follow us on Google News, LinkedIn, and X to Get Instant Updates and Set GBH as a Preferred Source in Google. Tags cyber security Cyber Security News Vulnerability Mayura Kathirhttps://gbhackers.com/ Mayura Kathir is a cybersecurity reporter at GBHackers News, covering daily incidents including data breaches, malware attacks, cybercrime, vulnerabilities, zero-day exploits, and more. Hot this week Infosec- Resources How To Access Dark Web Anonymously and know its Secretive and Mysterious Activities June 4, 2023 1 What is Deep Web The deep web, invisible web, or... SOC Architecture How to Build and Run a Security Operations Center (SOC Guide) – 2023 June 3, 2023 12 Today’s Cyber security operations center (CSOC) should have everything... Cyber Security News Network Penetration Testing Checklist – 2025 March 2, 2025 0 Network penetration testing is a cybersecurity practice that simulates... Cyber Security News Russian Hackers Bypass EDR to Deliver a Weaponized TeamViewer Component October 18, 2023 0 TeamViewer's popularity and remote access capabilities make it an... Checklist Web Server Penetration Testing Checklist – 2026 January 6, 2026 0 Web server pentesting is performed under three significant categories: identity,... Topics AcquisitionAdobeAdwareAIAmazonAmazon AWSAMDAndroidAnti VirusAntimalwareAntispoofingANY RUNApacheAPIAppleAPTArtificial IntelligenceAvastAWSAzureBackdoorBitcoinBluetoothBotnetBrowserBuffer over flowBug BountyBusinessChatbotsChatGPTChecklistChromeCiscoCISOCISO AdvisoryCloudCloud SecurityCloudflareComputer SecurityCourseCPUCross site ScriptingcryptocurrencyCryptocurrency hackCVE/vulnerabilityCyber AdvisoryCyber AICyber AttackCyber Crimecyber securityCyber security CourseCyber Security NewsCyber Security ResourcesDark WebData BreachData GovernanceDDOSDealsDeepSeekDiscordDNSDos AttackDriveDropboxEducationEmailEmail SecurityEthical HackingExploitExploitation ToolsExtratorrentsFACEBOOKFeaturedFirefoxFirefox NewsFirewallForensics ToolsgameGenAIGitHubGitLabGmailGoogleGoogle dorksGovernanceGRCHacking BooksHacksHardware HackingHBOHTMLHTTPIBMIISIncident ResponseInformation GatheringInformation Security RisksInfosec- ResourcesInsider ThreatsInstagramMore cyber security Handala Hackers Exploit RDP and NetBird in Coordinated Wiper Attacks 0 Handala Hack is an Iranian state-linked destructive actor that... Cyber Attack Cyberattack Hits Poland’s Nuclear Research Center 0 Poland's National Centre for Nuclear Research recently experienced a... Cyber Attack CamelClone Uses Public File-Sharing Sites in Government Cyberattacks 0 A new cyber espionage campaign dubbed Operation CamelClone, targeting... AI Betterleaks Launches as Open-Source Tool for Scanning Files, Directories, and Git Repositories 0 Zach Rice, the original creator of the widely popular... Botnet RondoDox Botnet Scales Up, Exploiting 174 Vulnerabilities via Residential IPs 0 RondoDox is a Mirai‑style botnet that has quickly evolved... cyber security MEA Shipment Phishing Scams Surge, Stealing Banking Data in Real Time 0 Every day, billions of people rely on postal and... Android Google Unveils Android 17 Advanced Protection Mode to Stop Malicious Services 0 Google is preparing to launch Android 17, introducing a... Cyber Security News Google Looker Studio Vulnerabilities Allow Attackers to Exfiltrate Data from Google Services 0 Tenable Research recently uncovered “LeakyLooker,” a critical set of... Related Articles Handala Hackers Exploit RDP and NetBird in Coordinated Wiper Attacks cyber security March 16, 2026 Cyberattack Hits Poland’s Nuclear Research Center Cyber Attack March 16, 2026 CamelClone Uses Public File-Sharing Sites in Government Cyberattacks Cyber Attack March 16, 2026 Betterleaks Launches as Open-Source Tool for Scanning Files, Directories, and Git Repositories AI March 16, 2026 RondoDox Botnet Scales Up, Exploiting 174 Vulnerabilities via Residential IPs Botnet March 16, 2026 Recent News Handala Hackers Exploit RDP and NetBird in Coordinated Wiper Attacks Mayura Kathir - March 16, 2026 Cyberattack Hits Poland’s Nuclear Research Center Divya - March 16, 2026 CamelClone Uses Public File-Sharing Sites in Government Cyberattacks Mayura Kathir - March 16, 2026 Betterleaks Launches as Open-Source Tool for Scanning Files, Directories, and Git Repositories Divya - March 16, 2026 RondoDox Botnet Scales Up, Exploiting 174 Vulnerabilities via Residential IPs Mayura Kathir - March 16, 2026 MEA Shipment Phishing Scams Surge, Stealing Banking Data in Real Time Mayura Kathir - March 16, 2026