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CWE-134

423 CVEs • Abstraction: Base • Likelihood of Exploit: High

Use of Externally-Controlled Format String

The product uses a function that accepts a format string as an argument, but the format string originates from an external source.

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CVEs (423)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Fortinet
4Fortianalyzer
Fortianalyzer Big DataFortimanager+1 more
Jun 17, 2026
Mar 12, 2024
N/A· v4
6.7 MEDIUM· v3
N/A· v2
A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute unauthorized code or commands via specially crafted command arguments.
1Fortinet
3Fortios
FortipamFortiproxy
Oct 22, 2026
Feb 22, 2024
N/A· v4
8.8 HIGH· v3
N/A· v2
A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.2.0 through 7.2.4, FortiOS 7.0.0 through 7.0.11, FortiOS 6.4.0 through 6.4.12, FortiOS 6.2.0 through 6.2.14, FortiOS 6.0.0 through 6.0.16,...Show more
A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.2.0 through 7.2.4, FortiOS 7.0.0 through 7.0.11, FortiOS 6.4.0 through 6.4.12, FortiOS 6.2.0 through 6.2.14, FortiOS 6.0.0 through 6.0.16, FortiOS 5.6 all versions, FortiOS 5.4 all versions, FortiOS 5.2 all versions, FortiOS 5.0 all versions, FortiOS 4.3 all versions, FortiOS 4.2 all versions, FortiOS 4.1 all versions, FortiOS 4.0 all versions, FortiPAM 1.0 all versions, FortiProxy 7.2.0 through 7.2.4, FortiProxy 7.0.0 through 7.0.10, FortiProxy 2.0.0 through 2.0.12, FortiProxy 01.02 all versions, FortiProxy 1.2 all versions, FortiProxy 01.01 all versions, FortiProxy 1.1 all versions, FortiProxy 01.00 all versions allows attacker to execute unauthorized code or commands via specially crafted command.Show less
1Zyxel
21Atp100 Firmware
Atp100w FirmwareAtp200 Firmware+18 more
Jun 17, 2026
Feb 20, 2024
N/A· v4
8.1 HIGH· v3
N/A· v2
A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG...Show more
A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration. Show less
1Zyxel
22Atp100 Firmware
Atp100w FirmwareAtp200 Firmware+19 more
Jun 17, 2026
Feb 20, 2024
N/A· v4
6.5 MEDIUM· v3
N/A· v2
A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 thro...Show more
A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.Show less
1Fortinet
4Fortios
FortipamFortiproxy+1 more
Jun 17, 2026
Feb 15, 2024
N/A· v4
9.8 CRITICAL· v3
N/A· v2
A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14...Show more
A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, FortiPAM versions 1.2.0, 1.1.0 through 1.1.2, 1.0.0 through 1.0.3, FortiSwitchManager versions 7.2.0 through 7.2.3, 7.0.0 through 7.0.3 allows attacker to execute unauthorized code or commands via specially crafted packets.Show less
1Gallagher
1Controller 6000 Firmware
Jun 17, 2026
Dec 18, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
A format string issue in the Controller 6000's optional diagnostic web interface can be used to write/read from memory, and in some instances crash the Controller 6000 leading to a Denial of Service. This issue affec...Show more
A format string issue in the Controller 6000's optional diagnostic web interface can be used to write/read from memory, and in some instances crash the Controller 6000 leading to a Denial of Service. This issue affects: Gallagher Controller 6000 8.60 prior to vCR8.60.231116a (distributed in 8.60.2550 (MR7)), all versions of 8.50 and prior. Show less
1Fortinet
3Fortios
FortipamFortiproxy
Jun 17, 2026
Dec 13, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
A use of externally-controlled format string in Fortinet FortiProxy versions 7.2.0 through 7.2.4, 7.0.0 through 7.0.10, FortiOS versions 7.4.0, 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, 6.2.0 throu...Show more
A use of externally-controlled format string in Fortinet FortiProxy versions 7.2.0 through 7.2.4, 7.0.0 through 7.0.10, FortiOS versions 7.4.0, 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiPAM versions 1.0.0 through 1.0.3 allows attacker to execute unauthorized code or commands via specially crafted API requests.Show less
1Wire
1Audio, Video, And Signaling
Jun 17, 2026
Nov 20, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
wire-avs provides Audio, Visual, and Signaling (AVS) functionality sure the secure messaging software Wire. Prior to versions 9.2.22 and 9.3.5, a remote format string vulnerability could potentially allow an attacker to...Show more
wire-avs provides Audio, Visual, and Signaling (AVS) functionality sure the secure messaging software Wire. Prior to versions 9.2.22 and 9.3.5, a remote format string vulnerability could potentially allow an attacker to cause a denial of service or possibly execute arbitrary code. The issue has been fixed in wire-avs 9.2.22 & 9.3.5 and is already included on all Wire products. No known workarounds are available.Show less
1Synology
2Bc500 Firmware
Tc500 Firmware
Jun 17, 2026
Oct 25, 2023
N/A· v4
9.8 CRITICAL· v3
N/A· v2
A vulnerability regarding use of externally-controlled format string is found in the cgi component. This allows remote attackers to execute arbitrary code via unspecified vectors. The following models with Synology Camer...Show more
A vulnerability regarding use of externally-controlled format string is found in the cgi component. This allows remote attackers to execute arbitrary code via unspecified vectors. The following models with Synology Camera Firmware versions before 1.0.5-0185 may be affected: BC500 and TC500.Show less
1Motorola
2Mtm5400 Firmware
Mtm5500 Firmware
Jun 17, 2026
Oct 19, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
A format string vulnerability exists in Motorola MTM5000 series firmware AT command handler for the AT+CTGL command. An attacker-controllable string is improperly handled, allowing for a write-anything-anywhere scenario....Show more
A format string vulnerability exists in Motorola MTM5000 series firmware AT command handler for the AT+CTGL command. An attacker-controllable string is improperly handled, allowing for a write-anything-anywhere scenario. This can be leveraged to obtain arbitrary code execution inside the teds_app binary, which runs with root privileges.Show less
1Asus
1Rt Ax88u Firmware
Jun 17, 2026
Sep 18, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
ASUS router RT-AX88U has a vulnerability of using externally controllable format strings within its Advanced Open VPN function. An authenticated remote attacker can exploit the exported OpenVPN configuration to execute...Show more
ASUS router RT-AX88U has a vulnerability of using externally controllable format strings within its Advanced Open VPN function. An authenticated remote attacker can exploit the exported OpenVPN configuration to execute an externally-controlled format string attack, resulting in sensitivity information leakage, or forcing the device to reset and permanent denial of service. Show less
1Asus
3Rt Ac86u Firmware
Rt Ax55 FirmwareRt Ax56u V2 Firmware
Jun 17, 2026
Sep 7, 2023
N/A· v4
7.2 HIGH· v3
N/A· v2
It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote atta...Show more
It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service. Show less
1Asus
3Rt Ac86u Firmware
Rt Ax55 FirmwareRt Ax56u V2 Firmware
Jun 17, 2026
Sep 7, 2023
N/A· v4
7.2 HIGH· v3
N/A· v2
It is identified a format string vulnerability in ASUS RT-AX56U V2’s General function API. This vulnerability is caused by lacking validation for a specific value within its apply.cgi module. A remote attacker with adm...Show more
It is identified a format string vulnerability in ASUS RT-AX56U V2’s General function API. This vulnerability is caused by lacking validation for a specific value within its apply.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service. Show less
1Asus
3Rt Ac86u Firmware
Rt Ax55 FirmwareRt Ax56u V2 Firmware
Jun 17, 2026
Sep 7, 2023
N/A· v4
7.2 HIGH· v3
N/A· v2
It is identified a format string vulnerability in ASUS RT-AX56U V2. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_svr.cgi module. A remote attacker with administrator priv...Show more
It is identified a format string vulnerability in ASUS RT-AX56U V2. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_svr.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service. Show less
1Totolink
1N200re V5 Firmware
Jun 17, 2026
Sep 4, 2023
N/A· v4
8.8 HIGH· v3
9.0 HIGH· v2
A vulnerability classified as critical has been found in TOTOLINK N200RE V5 9.3.5u.6437_B20230519. This affects the function Validity_check. The manipulation leads to format string. It is possible to initiate the attack...Show more
A vulnerability classified as critical has been found in TOTOLINK N200RE V5 9.3.5u.6437_B20230519. This affects the function Validity_check. The manipulation leads to format string. It is possible to initiate the attack remotely. The root-cause of the vulnerability is a format string issue. But the impact is to bypass the validation which leads to to OS command injection. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-238635.Show less
1Asus
2Rt Ac86u Firmware
Rt Ax56u V2 Firmware
Jun 17, 2026
Jul 21, 2023
N/A· v4
9.8 CRITICAL· v3
N/A· v2
It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by lacking validation for a specific value when calling cm_processChangedConfigMsg in ccm_processREQ_CHANGED_CO...Show more
It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by lacking validation for a specific value when calling cm_processChangedConfigMsg in ccm_processREQ_CHANGED_CONFIG function in AiMesh system. An unauthenticated remote attacker can exploit this vulnerability without privilege to perform remote arbitrary code execution, arbitrary system operation or disrupt service. This issue affects RT-AX56U V2: 3.0.0.4.386_50460; RT-AC86U: 3.0.0.4_386_51529.Show less
1Asus
2Rt Ac86u Firmware
Rt Ax56u V2 Firmware
Jun 17, 2026
Jul 21, 2023
N/A· v4
7.2 HIGH· v3
N/A· v2
It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by directly using input as a format string when calling syslog in logmessage_normal function, in the do_detwan_...Show more
It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by directly using input as a format string when calling syslog in logmessage_normal function, in the do_detwan_cgi module of httpd. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service. This issue affects RT-AX56U V2: 3.0.0.4.386_50460; RT-AC86U: 3.0.0.4_386_51529. Show less
1Zyxel
22Usg 20w Vpn Firmware
Usg 2200 Vpn FirmwareUsg Flex 100 Firmware+19 more
Jun 17, 2026
Jul 17, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 P...Show more
A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 5.10 through 5.36 Patch 2, and VPN series firmware versions 5.00 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands by using a crafted PPPoE configuration on an affected device when the cloud management mode is enabled.Show less
1Fortinet
2Fortios
Fortiproxy
Jun 17, 2026
Jun 13, 2023
N/A· v4
7.8 HIGH· v3
N/A· v2
A use of externally-controlled format string in Fortinet FortiOS version 7.2.0 through 7.2.4, FortiOS all versions 7.0, FortiOS all versions 6.4, FortiOS all versions 6.2, FortiProxy version 7.2.0 through 7.2.1, FortiPro...Show more
A use of externally-controlled format string in Fortinet FortiOS version 7.2.0 through 7.2.4, FortiOS all versions 7.0, FortiOS all versions 6.4, FortiOS all versions 6.2, FortiProxy version 7.2.0 through 7.2.1, FortiProxy version 7.0.0 through 7.0.7 allows attacker to execute unauthorized code or commands via specially crafted commands.Show less
1Trianglemicroworks
1Scada Data Gateway
Oct 23, 2026
Jun 7, 2023
N/A· v4
9.8 CRITICAL· v3
N/A· v2
On Triangle MicroWorks' SCADA Data Gateway version <= v5.01.03, an unauthenticated attacker can send a specially crafted broadcast message including format string characters to the SCADA Data Gateway to perform unrestric...Show more
On Triangle MicroWorks' SCADA Data Gateway version <= v5.01.03, an unauthenticated attacker can send a specially crafted broadcast message including format string characters to the SCADA Data Gateway to perform unrestricted memory reads.An unauthenticated user can use this format string vulnerability to repeatedly crash the GTWWebMonitor.exe process to DoS the Web Monitor. Furthermore, an authenticated user can leverage this vulnerability to leak memory from the GTWWebMonitor.exe process. This could be leveraged in an exploit chain to gain code execution.Show less