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CVE-2026-12220

Yealink SIP-T46U Firmware Chunk Upload handler accupgradebychunk mod_upgrade.SparePartsUpload stack-based overflow

A vulnerability has been found in Yealink SIP-T46U 108.86.0.118. This affects the function mod_upgrade.SparePartsUpload of the file /api/upgrade/accupgradebychunk of the component Firmware Chunk Upload handler. Such manipulation of the argument uid leads to stack-based buffer overflow. The attack can only be initiated within the local network. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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CVE-2026-12218

Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflow

A vulnerability was detected in Yealink SIP-T46U 108.87.50.1. The affected element is the function StartReportInformation of the file /api/inner/beforewifitest of the component Web FastCGI Service. The manipulation of the argument port results in stack-based buffer overflow. Access to the local network is required for this attack. The exploit is now public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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CVE-2026-57880

GV-LPC2011/LPC2211 - unauthorized buffer overflow via RTSP Digest username (ssvr)

An unauthenticated stack-based buffer overflow vulnerability exists in ssvr in GeoVision GV-LPC2011 and GV-LPC2211 V1.12 and earlier. The vulnerability is caused by insufficient bounds checking when parsing RTSP Digest authentication fields. A remote attacker may exploit this vulnerability by sending a crafted RTSP request containing overly long authentication data, resulting in memory corruption, denial of service, or potentially arbitrary code execution.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-57881

GV-LPC2011/LPC2211 - unauthorized stack-based buffer overflow vulnerability (vlsvr)

An unauthenticated stack-based buffer overflow vulnerability exists in vlsvr in GeoVision GV-LPC2011 and GV-LPC2211 V1.12 and earlier. The vulnerability is caused by insufficient length validation when processing remote login data. A remote attacker may exploit this vulnerability by sending crafted login data with overly long input, resulting in memory corruption, denial of service, or potentially arbitrary code execution.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-57878

GV-LPC2011/LPC2211 - unauthorized buffer overflow vulnerability (thttpd)

An unauthenticated stack-based buffer overflow vulnerability exists in thttpd in GeoVision GV-LPC2011 and GV-LPC2211 V1.12 and earlier. The vulnerability is caused by insufficient bounds checking when processing web request parameters in a specific request path. A remote attacker may exploit this vulnerability by sending a crafted HTTP request with overly long input, resulting in memory corruption, denial of service, or potentially arbitrary code execution.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
CVE-2026-56766

Hydra - Stack Buffer Overflow in NTLM Authentication Handler

Hydra through 9.7, fixed in commit 9cc84c2, contains a stack buffer overflow in NTLM authentication across SMTP, POP3, IMAP, NNTP, HTTP, HTTP-Proxy, and HTTP-Proxy-Urlenum modules when processing malicious NTLM Type-2 challenges. A malicious server can send a crafted NTLM Type-2 challenge with an excessively long domain string, causing base64-encoded response data to overflow a 500-byte stack buffer by 18 to 330 bytes, enabling remote code execution on systems without stack protection.

CVSS 4.0 · 8.6 High EPSS 2.4% KEV · Not listed
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CVE-2025-60474

Buffer Overflow in GPAC MP4Box Import Causing Denial of Service

A buffer overflow in the gf_media_import function (/media_tools/av_parsers.c) of GPAC Project/MP4Box before 26.02.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-51844

Stack Buffer Overflow in Tenda AC7 Router 'AdvSetMacMtuWan' Interface

Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the cloneType parameter.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-12485

GeoVision GV-I/O Box DVRSearch buffer overflow vulnerabilities in CMD_IP_SET command

GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by default on the IOBox listening for UDP messages on port 10001. Any user on the network can send messages to this service and interact with it. Upon receiving a UDP message, the server reads at most 1460 bytes into a local buffer and a pointer to the buffer is stored in a global variable: #### IP field stack overflow The following code is vulnerable to a stack overflow that is attacker-controlled: v3 = strlen(g_network_config->ip_addr); memcpy(&reply_buf[36], g_network_config->ip_addr, v3);

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
Vendors
CVE-2026-12847

GeoVision GV-I/O Box DVRSearch buffer overflow vulnerabilities in CMD_IP_SET command

GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by default on the IOBox listening for UDP messages on port 10001. Any user on the network can send messages to this service and interact with it. Upon receiving a UDP message, the server reads at most 1460 bytes into a local buffer and a pointer to the buffer is stored in a global variable: #### Gateway field stack overflow The following code is vulnerable to a stack overflow that is attacker-controlled: v7 = strlen(g_network_config->gateway); memcpy(&reply_buf[216], g_network_config->gateway, v7);

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
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CVE-2026-12846

GeoVision GV-I/O Box DVRSearch buffer overflow vulnerabilities in CMD_IP_SET command

GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by default on the IOBox listening for UDP messages on port 10001. Any user on the network can send messages to this service and interact with it. Upon receiving a UDP message, the server reads at most 1460 bytes into a local buffer and a pointer to the buffer is stored in a global variable: #### Net Mask field stack overflow The following code is vulnerable to a stack overflow that is attacker-controlled: v6 = strlen(g_network_config->net_mask); memcpy(&reply_buf[184], g_network_config->net_mask, v6);

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
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CVE-2026-12488

GeoVision GV-VMS V20 GV-Cloud memory corruption vulnerability

A memory corruption vulnerability exists in the GV-Cloud functionality of GeoVision GV-VMS V20 20.0.2.  A specially crafted network request can lead to a denial of service. An attacker can impersonate the legitimate server to trigger this vulnerability.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed
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CVE-2026-12848

GeoVision GV-I/O Box DVRSearch buffer overflow vulnerabilities in CMD_IP_SET command

GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and RS-485. DVRSearch is a service running by default on the IOBox listening for UDP messages on port 10001. Any user on the network can send messages to this service and interact with it. Upon receiving a UDP message, the server reads at most 1460 bytes into a local buffer and a pointer to the buffer is stored in a global variable: #### DNS field stack overflow The following code is vulnerable to a stack overflow that is attacker-controlled: v8 = strlen(g_network_config->dns_addr); memcpy(&reply_buf[248], g_network_config->dns_addr, v8);

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
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CVE-2026-44089

Buffer Overflow in Totolink EX1200L router

Totolink EX1200L router is vulnerable to Buffer Overflow in the login functionality in cgi-bin/cstecgi.cgi endpoint. This vulnerability could be exploited to cause the program to crash and to execute code remotely. This allows the attacker to perform actions as root including reading and editing data, as well as bricking the router. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 9.3.5u.6146_B20201023 but may also affect other versions.

CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
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CVE-2026-51845

Stack Buffer Overflow in Tenda AC7 /goform/AdvSetMacMtuWan Interface

Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the mac parameter.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-51846

Stack Buffer Overflow in Tenda AC7 Firmware Enabling Remote Code Execution

In Tenda AC7 v15.03.06.44, the wanSpeed parameter of the route /goform/AdvSetMacMtuWan has a stack buffer overflow vulnerability that can lead to remote arbitrary code execution.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-51843

Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the wanMTU parameter.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-48715

radvdump's Route Information Option Parser has a Stack Buffer Overflow

radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the `radvdump` utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, `print_ff()` copies up to 2032 bytes from attacker-controlled packet data into a 16-byte `struct in6_addr` on the stack, overflowing by up to 2016 bytes. Note that the main `radvd` daemon is not affected by the vulnerability. Version 2.21 patches the issue.

CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
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CVE-2025-55660

A stack overflow in the gf_opus_read_length function (media_tools/av_parsers.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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CVE-2026-5045

Tenda FH1201 Parameter WrlclientSet stack-based overflow

A vulnerability was detected in Tenda FH1201 1.2.0.14(408). This impacts the function WrlclientSet of the file /goform/WrlclientSet of the component Parameter Handler. Performing a manipulation of the argument GO results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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