Aggregates CVE and security vulnerability intelligence across all snort-related products, including CVSS, EPSS, publication dates, and vulnerability intelligence data.
Common weakness patterns include vendor risk buffer overflow and vendor risk denial of service, with potential vendor impact application crash across vendor surface production workloads use cases.
| CVE | Summary | Source | Max CVSS | EPSS % | Published | Updated |
|---|---|---|---|---|---|---|
| CVE-2023-20246 | Multiple Cisco products are affected by a vulnerability in Snort access control policies that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a logic error that occurs when the access control policies are being populated. An attacker could exploit this vulnerability by establishing a connection to an affected device. A successful exploit could allow the attacker to bypass configured access control rules on | [email protected] | 5.8 | 0.56% | 2023-11-01 | 2024-11-21 |
| CVE-2021-40114 | Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could a | [email protected] | 6.8 | 2.37% | 2021-10-27 | 2024-11-26 |
| CVE-2021-1495 | Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payloa | [email protected] | 5.8 | 1.71% | 2021-04-29 | 2024-11-21 |
| CVE-2021-1236 | Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload t | [email protected] | 5.3 | 2.15% | 2021-01-13 | 2024-11-26 |
| CVE-2021-1224 | Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload through an affected devi | [email protected] | 5.8 | 2.00% | 2021-01-13 | 2024-11-26 |
| CVE-2021-1223 | Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of an HTTP range header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload. | [email protected] | 7.5 | 1.98% | 2021-01-13 | 2024-11-26 |
| CVE-2020-3299 | Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured File Policy for HTTP. The vulnerability is due to incorrect detection of modified HTTP packets used in chunked responses. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured File Policy for HTTP packets and deliver a | [email protected] | 5.8 | 2.28% | 2020-10-21 | 2024-11-21 |
| CVE-2016-1417 | Untrusted search path vulnerability in Snort 2.9.7.0-WIN32 allows remote attackers to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse tcapi.dll that is located in the same folder on a remote file share as a pcap file that is being processed. | [email protected] | 8.8 | 4.43% | 2017-01-23 | 2026-05-13 |
| CVE-2009-3641 | Snort before 2.8.5.1, when the -v option is enabled, allows remote attackers to cause a denial of service (application crash) via a crafted IPv6 packet that uses the (1) TCP or (2) ICMP protocol. | [email protected] | 4.3 | 38.78% | 2009-10-28 | 2026-04-23 |
| CVE-2008-1804 | preprocessors/spp_frag3.c in Sourcefire Snort before 2.8.1 does not properly identify packet fragments that have dissimilar TTL values, which allows remote attackers to bypass detection rules by using a different TTL for each fragment. | [email protected] | 6.8 | 2.27% | 2008-05-22 | 2026-04-23 |
| CVE-2007-1398 | The frag3 preprocessor in Snort 2.6.1.1, 2.6.1.2, and 2.7.0 beta, when configured for inline use on Linux without the ip_conntrack module loaded, allows remote attackers to cause a denial of service (segmentation fault and application crash) via certain UDP packets produced by send_morefrag_packet and send_overlap_packet. | [email protected] | 7.1 | 5.57% | 2007-03-10 | 2026-04-23 |
| CVE-2006-5276 | Stack-based buffer overflow in the DCE/RPC preprocessor in Snort before 2.6.1.3, and 2.7 before beta 2; and Sourcefire Intrusion Sensor; allows remote attackers to execute arbitrary code via crafted SMB traffic. | [email protected] | 10.0 | 79.32% | 2007-02-20 | 2026-04-23 |
| CVE-2007-0251 | Integer underflow in the DecodeGRE function in src/decode.c in Snort 2.6.1.2 allows remote attackers to trigger dereferencing of certain memory locations via crafted GRE packets, which may cause corruption of log files or writing of sensitive information into log files. | [email protected] | 7.8 | 2.33% | 2007-01-16 | 2026-04-23 |
| CVE-2006-6931 | Algorithmic complexity vulnerability in Snort before 2.6.1, during predicate evaluation in rule matching for certain rules, allows remote attackers to cause a denial of service (CPU consumption and detection outage) via crafted network traffic, aka a "backtracking attack." | [email protected] | 5.0 | 2.31% | 2007-01-16 | 2026-04-23 |
| CVE-2003-0033 | Buffer overflow in the RPC preprocessor for Snort 1.8 and 1.9.x before 1.9.1 allows remote attackers to execute arbitrary code via fragmented RPC packets. | [email protected] | 10.0 | 11.89% | 2003-03-07 | 2026-06-16 |
| CVE-2001-1558 | Unknown vulnerability in IP defragmenter (frag2) in Snort before 1.8.3 allows attackers to cause a denial of service (crash). | [email protected] | 5.0 | 1.07% | 2001-12-31 | 2026-06-16 |
| CVE-2001-0669 | Various Intrusion Detection Systems (IDS) including (1) Cisco Secure Intrusion Detection System, (2) Cisco Catalyst 6000 Intrusion Detection System Module, (3) Dragon Sensor 4.x, (4) Snort before 1.8.1, (5) ISS RealSecure Network Sensor 5.x and 6.x before XPU 3.2, and (6) ISS RealSecure Server Sensor 5.5 and 6.0 for Windows, allow remote attackers to evade detection of HTTP attacks via non-standard "%u" Unicode encoding of ASCII characters in the requested URL. | [email protected] | 7.5 | 4.39% | 2001-10-30 | 2026-06-16 |
| CVE-2000-1226 | Snort 1.6, when running in straight ASCII packet logging mode or IDS mode with straight decoded ASCII packet logging selected, allows remote attackers to cause a denial of service (crash) by sending non-IP protocols that Snort does not know about, as demonstrated by an nmap protocol scan. | [email protected] | 5.0 | 1.26% | 2000-12-31 | 2026-06-16 |