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CWE-120

4,223 CVEs • Abstraction: Base • Likelihood of Exploit: High

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

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CVEs (4,223)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
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Jun 17, 2026
Jul 22, 2025
8.7 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability was found in D-Link DIR-513 up to 20190831. It has been declared as critical. This vulnerability affects the function formSetWanDhcpplus of the file /goform/formSetWanDhcpplus. The manipulation of the arg...Show more
A vulnerability was found in D-Link DIR-513 up to 20190831. It has been declared as critical. This vulnerability affects the function formSetWanDhcpplus of the file /goform/formSetWanDhcpplus. The manipulation of the argument curTime leads to buffer overflow. The attack can be initiated remotely. This vulnerability only affects products that are no longer supported by the maintainer.Show less
1Tenda
1Ac6 Firmware
Jun 17, 2026
Jul 21, 2025
8.7 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability has been found in Tenda AC6 15.03.06.50 and classified as critical. Affected by this vulnerability is the function setparentcontrolinfo of the component httpd. The manipulation leads to buffer overflow. T...Show more
A vulnerability has been found in Tenda AC6 15.03.06.50 and classified as critical. Affected by this vulnerability is the function setparentcontrolinfo of the component httpd. The manipulation leads to buffer overflow. The attack can be launched remotely.Show less
1Totolink
1T6 Firmware
Jun 17, 2026
Jul 21, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability, which was classified as critical, was found in TOTOLINK T6 4.1.5cu.748_B20211015. Affected is the function updateWifiInfo of the component MQTT Service. The manipulation of the argument serverIp leads to...Show more
A vulnerability, which was classified as critical, was found in TOTOLINK T6 4.1.5cu.748_B20211015. Affected is the function updateWifiInfo of the component MQTT Service. The manipulation of the argument serverIp leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.Show less
1Totolink
1T6 Firmware
Jun 17, 2026
Jul 20, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 4.1.5cu.748_B20211015. This issue affects the function recvSlaveUpgstatus of the component MQTT Service. The manipulation of the argument s...Show more
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 4.1.5cu.748_B20211015. This issue affects the function recvSlaveUpgstatus of the component MQTT Service. The manipulation of the argument s leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.Show less
1Totolink
1T6 Firmware
Jun 17, 2026
Jul 19, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. The manipulation of the argument dest lead...Show more
A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. The manipulation of the argument dest leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.Show less
1Riot Os
1Riot
Jun 17, 2026
Jul 18, 2025
6.6 MEDIUM· v4
9.8 CRITICAL· v3
N/A· v2
RIOT-OS, an operating system that supports Internet of Things devices, has an ineffective size check implemented with `assert()` can lead to buffer overflow in versions up to and including 2025.04. Assertions are usually...Show more
RIOT-OS, an operating system that supports Internet of Things devices, has an ineffective size check implemented with `assert()` can lead to buffer overflow in versions up to and including 2025.04. Assertions are usually compiled out in production builds. If assertions are the only defense against untrusted inputs, the software may be exposed to attacks that utilize the lack of proper input checks. In the `l2filter_add()` function shown below, `addr_len` is checked using an assertion and is subsequently used as an argument in a `memcpy()` call. When assertions are disabled, there would be no size check for `addr_len`. As a consequence, if an attacker were to provide an `addr_len` value larger than `CONFIG_L2FILTER_ADDR_MAXLEN`, they can trigger a buffer overflow and write past the `list[i].addr` buffer. If the unchecked input is attacker-controlled, the impact of the buffer overflow can range from a denial of service to arbitrary code execution. Commit f6f7de4ccc107c018630e4c15500825caf02e1c2 contains a patch for the vulnerability.Show less
1Totolink
1T6 Firmware
Jun 17, 2026
Jul 17, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 up to 4.1.5cu.748_B20211015. Affected by this issue is the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP...Show more
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 up to 4.1.5cu.748_B20211015. Affected by this issue is the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument ip leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.Show less
1Tenda
1Fh451 Firmware
Jun 17, 2026
Jul 17, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability classified as critical has been found in Tenda FH451 1.0.0.9. This affects the function fromWizardHandle of the file /goform/WizardHandle of the component POST Request Handler. The manipulation of the arg...Show more
A vulnerability classified as critical has been found in Tenda FH451 1.0.0.9. This affects the function fromWizardHandle of the file /goform/WizardHandle of the component POST Request Handler. The manipulation of the argument PPW leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.Show less
1Totolink
1N350rt Firmware
Jun 17, 2026
Jul 17, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
TOTOLINK N350RT V9.3.5u.6139_B20201216 was discovered to contain a buffer overflow via the ePort parameter in the function setIpPortFilterRules.
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Jun 17, 2026
Jul 16, 2025
8.6 HIGH· v4
N/A· v3
N/A· v2
A buffer overflow vulnerability exists in the X360 VideoPlayer ActiveX control (VideoPlayer.ocx) version 2.6 when handling overly long arguments to the ConvertFile() method. An attacker can exploit this vulnerability by...Show more
A buffer overflow vulnerability exists in the X360 VideoPlayer ActiveX control (VideoPlayer.ocx) version 2.6 when handling overly long arguments to the ConvertFile() method. An attacker can exploit this vulnerability by supplying crafted input to cause memory corruption and execute arbitrary code within the context of the current process.Show less
1Zyxel
24Emg3525 T50b Firmware
Emg5523 T50b FirmwareEmg5723 T50k Firmware+21 more
Jun 17, 2026
Jul 16, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
A buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could allow an unauthenticated attacker to cause denial-of-service (DoS) conditi...Show more
A buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and potentially execute arbitrary code by sending a specially crafted HTTP request.Show less
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Jun 17, 2026
Jul 15, 2025
8.4 HIGH· v4
N/A· v3
N/A· v2
A buffer overflow vulnerability exists in PDF Shaper versions 3.5 and 3.6 when converting a crafted PDF file to an image using the 'Convert PDF to Image' functionality. An attacker can exploit this vulnerability by trick...Show more
A buffer overflow vulnerability exists in PDF Shaper versions 3.5 and 3.6 when converting a crafted PDF file to an image using the 'Convert PDF to Image' functionality. An attacker can exploit this vulnerability by tricking a user into opening a maliciously crafted PDF file, leading to arbitrary code execution under the context of the user. This vulnerability has been verified on Windows XP, 7, 8, and 10 platforms using the PDFTools.exe component.Show less
1Utt
1840g Firmware
Jun 17, 2026
Jul 14, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability classified as critical has been found in UTT HiPER 840G up to 3.1.1-190328. This affects an unknown part of the file /goform/aspApBasicConfigUrcp. The manipulation of the argument Username leads to buffer...Show more
A vulnerability classified as critical has been found in UTT HiPER 840G up to 3.1.1-190328. This affects an unknown part of the file /goform/aspApBasicConfigUrcp. The manipulation of the argument Username leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.Show less
1Utt
1840g Firmware
Jun 17, 2026
Jul 14, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability was found in UTT HiPER 840G up to 3.1.1-190328. It has been rated as critical. Affected by this issue is some unknown functionality of the file /goform/aspRemoteApConfTempSend. The manipulation of the arg...Show more
A vulnerability was found in UTT HiPER 840G up to 3.1.1-190328. It has been rated as critical. Affected by this issue is some unknown functionality of the file /goform/aspRemoteApConfTempSend. The manipulation of the argument remoteSrcTemp leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.Show less
1Tenda
1Fh1201 Firmware
Jun 17, 2026
Jul 12, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability has been found in Tenda FH1201 1.2.0.14 and classified as critical. This vulnerability affects the function fromSafeUrlFilter of the file /goform/fromSafeUrlFilter of the component HTTP POST Request Handl...Show more
A vulnerability has been found in Tenda FH1201 1.2.0.14 and classified as critical. This vulnerability affects the function fromSafeUrlFilter of the file /goform/fromSafeUrlFilter of the component HTTP POST Request Handler. The manipulation of the argument page leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.Show less
1Tenda
1Fh1201 Firmware
Jun 17, 2026
Jul 12, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability classified as critical was found in Tenda FH1201 1.2.0.14. Affected by this vulnerability is the function fromRouteStatic of the file /goform/fromRouteStatic of the component HTTP POST Request Handler. Th...Show more
A vulnerability classified as critical was found in Tenda FH1201 1.2.0.14. Affected by this vulnerability is the function fromRouteStatic of the file /goform/fromRouteStatic of the component HTTP POST Request Handler. The manipulation of the argument page leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.Show less
1Tenda
1Fh1201 Firmware
Jun 17, 2026
Jul 12, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability was found in Tenda FH1201 1.2.0.14. It has been declared as critical. This vulnerability affects the function formWrlsafeset of the file /goform/AdvSetWrlsafeset of the component HTTP POST Request Handler...Show more
A vulnerability was found in Tenda FH1201 1.2.0.14. It has been declared as critical. This vulnerability affects the function formWrlsafeset of the file /goform/AdvSetWrlsafeset of the component HTTP POST Request Handler. The manipulation of the argument mit_ssid leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.Show less
1Ivanti
1Avalanche
Jun 17, 2026
Jul 12, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
A security vulnerability within Ivanti Avalanche Manager before version 6.4.1 may allow an unauthenticated attacker to create a buffer overflow that could result in service disruption or arbitrary code execution.
1Totolink
1T6 Firmware
Jun 17, 2026
Jul 11, 2025
7.4 HIGH· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component HTTP POST R...Show more
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument mac leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.Show less
1Zoom
1Zoom
Jun 17, 2026
Jul 10, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.