Cisco fixes 3 high-severity DoS flaws in NX
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[dos] EVerest 2025.9.0 - DoS
A public proof-of-concept denial-of-service exploit has been published for the EVerest 2025.9.0 open-source EV charging framework.
Exploit-DB lists a denial-of-service proof of concept targeting EVerest version 2025.9.0. EVerest is an open-source software framework used for EV charging infrastructure. No in-the-wild exploitation or CVE mapping is stated in the listing.
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[dos] NanaZip 6.5 - DoS
A denial-of-service proof-of-concept targeting NanaZip 6.5 has been published on Exploit-DB.
Exploit-DB entry 52656 contains a public proof-of-concept that triggers a denial-of-service condition in NanaZip 6.5. The listing is limited to the vulnerability title and does not include CVE identifiers or details on exploitation conditions. No evidence of in-the-wild exploitation is provided.
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[dos] NanaZip 6.5 - DoS
A denial-of-service proof of concept for NanaZip 6.5 was published on Exploit-DB.
Exploit-DB carries a denial-of-service proof-of-concept targeting NanaZip version 6.5. NanaZip is an open-source file archiver packaged for Windows. The entry cites no CVE id and no evidence of active exploitation.
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Cisco fixes vulnerability exploited to DoS its firewalls (CVE-2026-20349)
Cisco patches CVE-2026-20349, a high-severity unauthenticated DoS in ASA and FTD VPN services now added to CISA's KEV.
CVE-2026-20349 affects the Remote Access SSL VPN service in Cisco Secure Firewall ASA and FTD software, where specially crafted unauthenticated HTTP requests can cause appliances to reload, creating a denial of service. Cisco confirmed active exploitation observed in August 2026 and released hot fixes for ASA versions 9.16 through 9.24 and FTD versions 7.0 through 10.0. The flaw was added to CISA's Known Exploited Vulnerabilities catalog with a remediation deadline of August 14, 2026 for US civilian federal agencies. No workarounds or indicators of compromise are available.
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Cisco ASA and FTD Flaw Exploited in the Wild Can Trigger Remote DoS
Cisco warns actively exploited flaw CVE-2026-20349 lets unauthenticated attackers crash ASA and FTD firewalls via SSL VPN; CISA added it to KEV.
Cisco fixed CVE-2026-20349 (CVSS 8.6) in Secure Firewall ASA and FTD software, insufficient error checking in HTTP request processing that lets unauthenticated remote attackers force device reloads via crafted requests to the Remote Access SSL VPN service. Hotfixes cover ASA 9.16 through 9.24 and FTD 7.0 through 10.0, and there are no workarounds; Cisco confirmed active exploitation earlier in August but did not name the actor or targets. The flaw was found during internal security testing. CISA added it to the KEV catalog, requiring federal civilian agencies to patch by August 14, 2026.
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Cisco ASA and FTD DoS Vulnerability Exploited in the Wild (CVE-2026-20349)
Cisco patched actively exploited high-severity flaw CVE-2026-20349 in ASA and FTD SSL VPN services, allowing unauthenticated remote denial-of-service attacks.
Cisco released a security advisory addressing CVE-2026-20349, a high-severity vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall ASA and FTD Software. Successful exploitation by an unauthenticated remote attacker can cause affected devices to crash or reload, causing denial of service. The vulnerability is being exploited in the wild, and patches are available; organizations with internet-exposed ASA/FTD VPN endpoints should prioritize updating.
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[dos] Nmap 7.99 - Extension Header Integer Underflow
A proof-of-concept denial-of-service exploit for Nmap 7.99 leverages an integer underflow in extension header parsing to crash the scanner.
Exploit-DB lists a denial-of-service proof of concept targeting Nmap version 7.99. The flaw is an integer underflow when handling extension headers, which can crash the scanner. No exploitation in the wild or patch details are mentioned in the listing.
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[dos] LuCI DHCPv6 - Lease Hostname Stored Cross-Site Scripting
Stored cross-site scripting in OpenWrt LuCI via malicious DHCPv6 lease hostnames allows router interface attacks.
Exploit-DB entry 52637 describes a stored cross-site scripting vulnerability in LuCI, the OpenWrt web administration interface. A attacker on the local network can set a malicious hostname that gets stored in DHCPv6 lease data and rendered unsafely in the LuCI UI. When an administrator views the lease status page, the injected script executes in the router's management context.
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February 2021 Patch Tuesday: Microsoft and Adobe fix exploited zero-days
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