NtopCVEs & Vulnerabilities

21 CVEs affecting Ntop products, tracked from the National Vulnerability Database, with CVSS/EPSS scores and exploitation status.

Most Affected Products

ndpi 10ntopng 10ntop 2
CVE-2026-38968CRITICAL

ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking. HTTP session identifiers in src/HTTPserver.cpp use weak time-seeded pseudo-randomness during session creation. As a result, fresh authenticated logins can receive deterministic or colliding session cookies under attacker-controlled timing.

3 Jul 2026
9.8
CVSS
CVE-2025-25066HIGH

nDPI through 4.12 has a potential stack-based buffer overflow in ndpi_address_cache_restore in lib/ndpi_cache.c.

3 Feb 2025
8.4
CVSS
CVE-2021-36082HIGH

ntop nDPI 3.4 has a stack-based buffer overflow in processClientServerHello.

1 Jul 2021
8.8
CVSS
CVE-2020-15476HIGH

In nDPI through 3.2, the Oracle protocol dissector has a heap-based buffer over-read in ndpi_search_oracle in lib/protocols/oracle.c.

1 Jul 2020
7.5
CVSS
CVE-2020-15475CRITICAL

In nDPI through 3.2, ndpi_reset_packet_line_info in lib/ndpi_main.c omits certain reinitialization, leading to a use-after-free.

1 Jul 2020
9.8
CVSS
CVE-2020-15474CRITICAL

In nDPI through 3.2, there is a stack overflow in extractRDNSequence in lib/protocols/tls.c.

1 Jul 2020
9.8
CVSS
CVE-2020-15473CRITICAL

In nDPI through 3.2, the OpenVPN dissector is vulnerable to a heap-based buffer over-read in ndpi_search_openvpn in lib/protocols/openvpn.c.

1 Jul 2020
9.1
CVSS
CVE-2020-15472CRITICAL

In nDPI through 3.2, the H.323 dissector is vulnerable to a heap-based buffer over-read in ndpi_search_h323 in lib/protocols/h323.c, as demonstrated by a payload packet length that is too short.

1 Jul 2020
9.1
CVSS
CVE-2020-15471CRITICAL

In nDPI through 3.2, the packet parsing code is vulnerable to a heap-based buffer over-read in ndpi_parse_packet_line_info in lib/ndpi_main.c.

1 Jul 2020
9.1
CVSS
CVE-2020-11940HIGH

In nDPI through 3.2 Stable, an out-of-bounds read in concat_hash_string in ssh.c can be exploited by a network-positioned attacker that can send malformed SSH protocol messages on a network segment monitored by nDPI's library.

23 Apr 2020
7.5
CVSS
CVE-2020-11939CRITICAL

In nDPI through 3.2 Stable, the SSH protocol dissector has multiple KEXINIT integer overflows that result in a controlled remote heap overflow in concat_hash_string in ssh.c. Due to the granular nature of the overflow primitive and the ability to control both the contents and layout of the nDPI library's heap memory through remote input, this vulnerability may be abused to achieve full Remote Code Execution against any network inspection stack that is linked against nDPI and uses it to perform network traffic analysis.

23 Apr 2020
9.8
CVSS
CVE-2018-12520HIGHpoc

An issue was discovered in ntopng 3.4 before 3.4.180617. The PRNG involved in the generation of session IDs is not seeded at program startup. This results in deterministic session IDs being allocated for active user sessions. An attacker with foreknowledge of the operating system and standard library in use by the host running the service and the username of the user whose session they're targeting can abuse the deterministic random number generation in order to hijack the user's session, thus escalating their access.

5 Jul 2018
8.1
CVSS
CVE-2017-7458HIGH

The NetworkInterface::getHost function in NetworkInterface.cpp in ntopng before 3.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty field that should have contained a hostname or IP address.

27 Jun 2017
7.5
CVSS
CVE-2017-7459HIGH

ntopng before 3.0 allows HTTP Response Splitting.

26 Jun 2017
7.5
CVSS
CVE-2017-7416MEDIUM

ntopng before 3.0 allows XSS because GET and POST parameters are improperly validated.

26 Jun 2017
6.1
CVSS
CVE-2017-5473HIGHpoc

Cross-site request forgery (CSRF) vulnerability in ntopng through 2.4 allows remote attackers to hijack the authentication of arbitrary users, as demonstrated by admin/add_user.lua, admin/change_user_prefs.lua, admin/delete_user.lua, and admin/password_reset.lua.

14 Jan 2017
8.8
CVSS
CVE-2015-8368MEDIUMpoc

ntopng (aka ntop) before 2.2 allows remote authenticated users to change the login context and gain privileges via the user cookie and username parameter to admin/password_reset.lua.

17 Dec 2015
6.0
CVSS
CVE-2014-5464MEDIUMpoc

Cross-site scripting (XSS) vulnerability in the nDPI traffic classification library in ntopng (aka ntop) before 1.2.1 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.

8 Sep 2014
4.3
CVSS
CVE-2014-4329MEDIUM

Cross-site scripting (XSS) vulnerability in lua/host_details.lua in ntopng 1.1 allows remote attackers to inject arbitrary web script or HTML via the host parameter.

19 Jun 2014
4.3
CVSS
CVE-2014-4165MEDIUM

Cross-site scripting (XSS) vulnerability in ntop allows remote attackers to inject arbitrary web script or HTML via the title parameter in a list action to plugins/rrdPlugin.

16 Jun 2014
4.3
CVSS
CVE-2009-2732MEDIUMpoc

The checkHTTPpassword function in http.c in ntop 3.3.10 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an Authorization HTTP header that lacks a : (colon) character in the base64-decoded string.

21 Aug 2009
5.0
CVSS
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