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Citrix security advisory (AV26-645) – Update 3
Canada's Cyber Centre updates Citrix advisory as CVE-2026-8451 and CVE-2026-8452 in NetScaler ADC/Gateway are confirmed exploited in the wild.
The Canadian Centre for Cyber Security updated advisory AV26-645 on August 26, 2026, covering critical vulnerabilities in Citrix NetScaler ADC and Gateway (versions 14.1 before 14.1-72.61 and 13.1 before 13.1-63.18, plus FIPS builds). Open-source reporting indicates CVE-2026-8451 and CVE-2026-8452 are being exploited in the wild. Update 3 references related CISA action, and patched builds were released starting June 30, 2026.
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NSA, CISA, FBI, DOE, and EPA Warn of Active AI
Five US agencies warn of active AI-assisted attacks on internet-exposed Siemens S7 PLCs across critical infrastructure, using disguised snap7 scripts for pre-positioning reconnaissance.
NSA, CISA, FBI, DOE, and EPA issued joint advisory CISA AA26-231A warning of an active hacking campaign against Siemens S7-series PLCs, from S7-200 through S7-1500 F-series, across US critical infrastructure. Threat actors use internet scanning services such as Censys and ZoomEye to locate exposed controllers, then perform read operations over S7comm on TCP port 102 using the legitimate snap7.dll and python-snap7 libraries, disguising AI-generated exploitation scripts as monitoring tools. The agencies assess the activity as pre-positioning ahead of possible process disruption, equipment damage, or safety incidents in Energy, Water, Critical Manufacturing, Chemical, Food and Agriculture, and Commercial Facilities sectors.
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Cisco security advisory (AV26-197) – Update 3
CISA added Cisco CVE-2026-20079 to its KEV catalog; the Canadian Cyber Centre urges updates across Secure Firewall ASA, FTD, FMC, and SCC products.
The Canadian Centre for Cyber Security updated advisory AV26-197 covering March 2026 Cisco advisories for Security Cloud Control, Secure Firewall Management Center, ASA, and FTD. Cisco confirmed CVE-2026-20131 was actively exploited on March 18, 2026, and CISA added it to KEV on March 19. In Update 3, dated September 9, 2026, CISA added CVE-2026-20079 to the KEV catalog. The underlying flaws include FMC authentication bypass and remote code execution, ASA TCP-flood denial of service, and ASA/FTD IPsec denial of service.
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Fortinet security advisory (AV26-023) - Update 1
CISA added Fortinet CVE-2025-25249, a heap-based buffer overflow in the cw_acd daemon, to its KEV catalog; Canadian Cyber Centre urges patching.
The Canadian Centre for Cyber Security updated advisory AV26-023, which relays January 2026 Fortinet advisories covering FortiFone, FortiOS, FortiSASE, FortiSIEM, and FortiSwitchManager. On September 9, 2026, CISA added CVE-2025-25249, a heap-based buffer overflow in the cw_acd daemon, to its Known Exploited Vulnerabilities catalog. Related Fortinet flaws include unauthenticated local configuration access (CVE-2025-47855) and unauthenticated remote command injection (CVE-2025-64155). Administrators should review the advisories and apply available updates.
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SonicWall security advisory (AV26-872) – Update 1
CISA added exploited SonicWall SMA1000 flaws CVE-2026-83548 and CVE-2026-83549 to KEV; admins of affected hotfix versions should patch.
Canada's Cyber Centre (advisory AV26-872, Update 1) relays a SonicWall advisory for SMA1000 appliances (6210, 7210, 8200v), stating CVE-2026-83548 and CVE-2026-83549 are being exploited. CISA added both flaws to its Known Exploited Vulnerabilities catalog on September 2, 2026. Affected versions include platform-hotfix 12.4.3-03453 and 12.5.0-02835 and older; administrators should apply available updates.
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Critical Gitea Flaw Let Unauthenticated Attackers Read Server Files via Org
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US, UK accuse Russian military hackers of battering-ram password attacks against hundreds of targets
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Citrix security advisory (AV26-833) - Update 1
CISA added actively exploited NetScaler flaw CVE-2026-19490 to its KEV catalog; the Canadian Cyber Centre urges Citrix ADC and Gateway admins to patch.
The Canadian Centre for Cyber Security updated advisory AV26-833 covering Citrix NetScaler ADC and Gateway vulnerabilities in versions 13.1 (prior to 13.1-63.21) and 14.1 (prior to 14.1-73.32), plus FIPS builds. On September 9, 2026, CISA added CVE-2026-19490 to the Known Exploited Vulnerabilities catalog, indicating confirmed exploitation. The bulletin also references CVE-2026-19489 from the Citrix NetScaler ADC and Gateway Security Bulletin. Administrators should apply the fixed builds, including 13.1-37.277 and 14.1-73.32 for FIPS variants.
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JFrog security advisory (AV26-867) – Update 1
CISA added actively exploited CVE-2026-82329 in JFrog Artifactory to its KEV catalog; administrators of affected versions should patch.
Canada's Cyber Centre (advisory AV26-867, Update 1) relays a JFrog security advisory covering Artifactory, where open-source reporting indicates CVE-2026-82329 is being exploited in the wild. CISA added the flaw to its Known Exploited Vulnerabilities catalog on September 2, 2026. Multiple Artifactory release lines prior to fixed versions (e.g., prior to 7.111.21 through 7.161.20) are affected; users and administrators are urged to apply available updates.
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Oracle security advisory – January 2026 quarterly rollup (AV26-042) – Update 2
CISA added actively exploited Oracle flaw CVE-2026-21962 to the KEV catalog; it allows remote unauthorized access to Oracle HTTP Server and WebLogic Proxy Plug-in.
Canada's Cyber Centre updated advisory AV26-042 on Oracle's January 2026 quarterly rollup, reporting that CISA added CVE-2026-21962 to the Known Exploited Vulnerabilities catalog on August 24, 2026. The flaw affects the Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-in in Oracle Fusion Middleware and may allow a remote attacker to obtain unauthorized access. A public proof of concept has been available since January 21, 2026, and fixes shipped in Oracle's January 20, 2026 advisory covering multiple products.
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Ongoing exploitation of Cisco Catalyst SD
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Threat Advisory: Critical Apache Log4j vulnerability being exploited in the wild
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Cisco confirms CVE-2026-20079 Secure FMC flaw exploited in attacks
Cisco confirmed active exploitation of CVE-2026-20079, a CVSS 10.0 authentication bypass enabling unauthenticated root command execution in Secure FMC; CISA added it to KEV.
Cisco confirmed in August 2026 that CVE-2026-20079 (CVSS 10.0), an unauthenticated authentication bypass in Secure Firewall Management Center, is being actively exploited, allowing remote attackers to execute scripts and commands as root via crafted HTTP requests to the web interface. CISA added the flaw to its Known Exploited Vulnerabilities catalog, ordering federal civilian agencies to patch by September 12, 2026. Shared IOCs, identical hot fixes, and a July 23 log entry suggest CVE-2026-20079 was used alongside the separately exploited static-credential flaw CVE-2026-20316 in the same attacks. Cisco released patches and cloud fixes, warns hot fixes do not remediate already-compromised devices, and says there are no workarounds.
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Microsoft breaks Patch Tuesday record with 974-CVE deluge
Microsoft's record 974-CVE Patch Tuesday ships two exploited Windows zero-days, while Adobe's StyleSmuggler zero-day (CVE-2026-75650) gives unauthenticated RCE in Magento.
Microsoft's September Patch Tuesday addresses 974 CVEs, including two zero-days already under exploitation: CVE-2026-85880, a Windows ALPC privilege escalation leading to SYSTEM via sandbox escape, and CVE-2026-81963, a Windows Update Stack privilege escalation. Adobe patched 172 CVEs, including the max-severity StyleSmuggler zero-day CVE-2026-75650 in Magento and Adobe Commerce, which Sansec reports is being exploited since September 4 to inject PHP into templates and install a C2-connected backdoor. CISA added CVE-2026-85880, CVE-2026-81963, and CVE-2026-75650 to its Known Exploited Vulnerabilities Catalog with patch deadlines of September 22 and September 11. The piece also notes Google-patched Chrome V8 zero-day CVE-2026-85046 lacks a Microsoft advisory for Edge, and flags nine Exchange Server flaws including remote unauthenticated RCE CVE-2026-55007.
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Critical N-able N-central Vulnerability and Active Exploitation
N-able N-central pre-auth RCE zero-day CVE-2026-86218 (CVSS 10.0) is exploited in the wild; on-prem admins must upgrade to 2026.3 HF4.
N-able disclosed a third N-central vulnerability, CVE-2026-86218, a pre-authentication RCE rated CVSS 10.0, and released hotfix 2026.3 HF4 superseding build 2026.3.1.13. Huntress reproduced an exploit chain involving an authentication bypass (CVE-2026-86206/CVE-2026-86207) after a fully patched customer's N-central production server was compromised on September 4. Attackers appended strings like .invalid to account names and probed the /remoteControlAction.do?method=getPierDetails endpoint; Huntress worked with Cloudflare to disable adversary tunnel infrastructure. Hosted N-central instances are already patched; on-prem administrators must upgrade immediately.
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Google security advisory (AV26-883) – Update 1
Google patched actively exploited Chrome flaw CVE-2026-85046 in Chrome 152.0.7977.82; CISA added it to the KEV catalog, urging updates.
The Canadian Centre for Cyber Security (advisory AV26-883, Update 1) reports Google fixed CVE-2026-85046 in Chrome 152.0.7977.82 and that an exploit exists in the wild. CISA added the vulnerability to its Known Exploited Vulnerabilities database on September 4, 2026. Users and administrators should update Chrome stable desktop channels promptly.
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Rogue ScreenConnect Installations Across Unrelated Hosts Suggest Worm-Like Activity
Huntress observed rogue ScreenConnect deployments with worm-like VBScript propagation across unrelated organizations, prompting a ConnectWise advisory on file transfer behavior.
Huntress identified multiple incidents in late August 2026 where social engineering led to rogue ScreenConnect remote access clients deployed on victim machines, which then spawned wscript.exe to run four VBScript payloads (1.vbs through 4.vbs) for profiling, telemetry collection, and persistence via a WindowsServiceHost Run key. Modified ScreenConnect clients propagated the VBScript chain to connected endpoints, creating worm-like spread. ConnectWise published an advisory on September 3, 2026, confirming an issue affecting file transfer behavior in both cloud and on-premises ScreenConnect deployments, with a CVE and fix expected within the week; partners were advised to review and disable TransferFiles permissions in the interim.
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PaperCut security advisory (AV26-858) – Update 2
CISA added actively exploited PaperCut MF/NG flaws CVE-2026-81578 and CVE-2026-82078 to KEV; Canada's Cyber Centre urges Emergency Patch Release 2 for v24-v26.
Canada's Cyber Centre updated security advisory AV26-858, noting PaperCut MF and PaperCut NG versions prior to the v24, v25, and v26 Emergency Patch Release 2 are affected by CVE-2026-81578 and CVE-2026-82078. Open-source reporting indicates both vulnerabilities are being exploited in the wild. In Update 2 (August 31, 2026), CISA added both CVEs to its Known Exploited Vulnerabilities catalog, and the Cyber Centre urges administrators to apply the emergency patches immediately.
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Gitea security advisory (AV26-845)
CISA added CVE-2026-60004, an actively exploited RCE via diffpatch Git hook installation in Gitea, to the KEV catalog; users should upgrade past 1.27.1.
Canadian Centre for Cyber Security advisory AV26-845 reports that Gitea versions prior to 1.27.1 are affected by CVE-2026-60004, remote code execution via diffpatch Git hook installation. CISA added the vulnerability to its Known Exploited Vulnerabilities catalog on August 25, 2026, indicating observed exploitation. Fixed releases 1.27.1 and 1.27.2 are available, and administrators should upgrade promptly.
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Researchers Build Self-Replicating AI Worm That Operates Entirely on Local, Open
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U.S. CISA adds Cisco ISE and PaperCut NG/MF flaws to its Known Exploited Vulnerabilities catalog
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