CVE-2026-20023

A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service DoS condition...

EUVD-2026-9482

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF...

CVE-2026-20022

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the...

CVE-2026-20023

A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service DoS condition...

CVE-2026-20023

A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service DoS condition...

CVE-2026-20022

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the...

CVE-2026-20020

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. If OSPF authentication is enabled, the attacker must know th...

CVE-2026-20020

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. If OSPF authentication is enabled, the attacker must know th...

CVE-2026-20020: Improper Input Validation

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. If OSPF authentication is enabled, the attacker must know th...

CVE-2026-20023: Out-of-bounds Write

A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service DoS condition...

TencentOS Server 4: frr (TSSA-2025:0853)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0853 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities...

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_adj_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packet.

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AZL-69571 CVE-2025-61104 affecting package frr for versions less than 9.1.1-5

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the showvtyunknowntlv function at ospfext.c. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted OSPF packet...

PT-2025-44180

Name of the Vulnerable Software and Affected Versions FRRouting/frr versions 4.0 through 10.4.1 Description FRRouting/frr contains a flaw due to a NULL pointer dereference in the show vty unknown tlv function located at ospf ext.c. This issue can be triggered by a specially crafted OSPF packet,...

CVE-2025-61106

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the showvtyextprefprefsid function at ospfext.c. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted OSPF packet...

CVE-2025-61104

The FRRouting (FRR) suite of internet routing protocol daemons (versions v4.0 through v10.4.1 ) contains a NULL pointer dereference vulnerability in the show_vty_unknown_tlv function located at ospf_ext.c. This flaw is triggered by processing a crafted OSPF packet , which can allow a remote attac...

CVE-2025-61104

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the showvtyunknowntlv function at ospfext.c. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted OSPF packet...

EUVD-2025-36325

FRRouting/frr from v2.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the opaqueinfodetail function at ospfopaque.c. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted LS Update packet...

AZL-69619 CVE-2025-61099 affecting package frr for versions less than 8.5.5-5

FRRouting/frr from v2.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the opaqueinfodetail function at ospfopaque.c. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted LS Update packet...

CVE-2025-61101

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the showvtyextlinkrmtitfaddr function at ospfext.c. This vulnerability allows attackers to cause a Denial of Service DoS via a crafted OSPF packet...