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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
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Oct 16, 2026
Oct 15, 2026
N/A· v4
8.3 HIGH· v3
N/A· v2
Use of Externally-Controlled format string vulnerability in Unitronics Unitronics UniStream Pro/UniLogic. This issue affects Unitronics UniStream Pro/UniLogic: Unitronics UniStream Pro versions only (B10 / C10) – UniLog...Show more
Use of Externally-Controlled format string vulnerability in Unitronics Unitronics UniStream Pro/UniLogic. This issue affects Unitronics UniStream Pro/UniLogic: Unitronics UniStream Pro versions only (B10 / C10) – UniLogic versions prior to 1.41.329.Show less
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Oct 15, 2026
Oct 14, 2026
9.2 CRITICAL· v4
8.1 HIGH· v3
N/A· v2
An Use of Externally-Controlled Format String vulnerability in the ipfd daemon of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker to execute code with root privileges via a compro...Show more
An Use of Externally-Controlled Format String vulnerability in the ipfd daemon of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker to execute code with root privileges via a compromised or impersonated configured HTTPS feed server.Show less
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Oct 15, 2026
Oct 14, 2026
8.8 HIGH· v4
8.2 HIGH· v3
N/A· v2
A Use of Externally-Controlled Format String vulnerability in the jti-dialoutd of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause persistent telemetry dial-out denial of service via a...Show more
A Use of Externally-Controlled Format String vulnerability in the jti-dialoutd of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause persistent telemetry dial-out denial of service via a crafted analytics sensor resource submitted through gNMI listener.Show less
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Oct 15, 2026
Oct 14, 2026
8.7 HIGH· v4
8.8 HIGH· v3
N/A· v2
An Use of Externally-Controlled Format String vulnerability in the gRPC daemon of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause telemetry-service disruption, information disclosure,...Show more
An Use of Externally-Controlled Format String vulnerability in the gRPC daemon of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause telemetry-service disruption, information disclosure, or potential root-level code execution via a crafted message to the gNMI service.Show less
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Oct 15, 2026
Oct 13, 2026
N/A· v4
4.9 MEDIUM· v3
N/A· v2
Use of externally-controlled format string in SQL Server allows an authorized attacker to deny service over a network.
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Oct 16, 2026
Oct 13, 2026
N/A· v4
7.8 HIGH· v3
N/A· v2
Use of externally-controlled format string in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.
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Oct 16, 2026
Oct 13, 2026
N/A· v4
7.8 HIGH· v3
N/A· v2
Use of externally-controlled format string in Windows NTFS allows an authorized attacker to elevate privileges locally.
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Oct 8, 2026
Oct 6, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
A format string vulnerability in an affected service interface of HPE Networking ClearPass Policy Manager could allow an unauthenticated remote attacker to corrupt process memory. Successful exploitation could allow an a...Show more
A format string vulnerability in an affected service interface of HPE Networking ClearPass Policy Manager could allow an unauthenticated remote attacker to corrupt process memory. Successful exploitation could allow an attacker to execute arbitrary code.Show less
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Oct 2, 2026
Oct 1, 2026
9.4 CRITICAL· v4
N/A· v3
N/A· v2
Use of an Externally Controlled Format String in the ASUS Router modules allow a remote authenticated user to execute arbitrary commands via a crafted file uploaded through the web management interface.
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Oct 1, 2026
Sep 30, 2026
N/A· v4
7.8 HIGH· v3
N/A· v2
NVIDIA GPU Display Driver for Linux contains a vulnerability where a user might be able to cause a format string issue. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, d...Show more
NVIDIA GPU Display Driver for Linux contains a vulnerability where a user might be able to cause a format string issue. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, data tampering, denial of service, and information disclosure.Show less
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Oct 1, 2026
Sep 29, 2026
N/A· v4
6.6 MEDIUM· v3
N/A· v2
A format string vulnerability in the API endpoint of HPE Networking Instant ON APs could allow an authenticated remote attacker with high privileges to cause memory corruption with a modified input. Successful exploitati...Show more
A format string vulnerability in the API endpoint of HPE Networking Instant ON APs could allow an authenticated remote attacker with high privileges to cause memory corruption with a modified input. Successful exploitation could allow an attacker to provoke a denial-of-service condition or remote code execution in the affected system function.Show less
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Oct 1, 2026
Sep 29, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Uncontrolled Format string vulnerabilities exist in the affected interface of HPE Networking Instant ON APs that could allow an unauthenticated remote attacker to run arbitrary commands on the underlying host. Successful...Show more
Uncontrolled Format string vulnerabilities exist in the affected interface of HPE Networking Instant ON APs that could allow an unauthenticated remote attacker to run arbitrary commands on the underlying host. Successful exploitation could result in a Denial-of-service or potential remote code execution.Show less
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Sep 24, 2026
Sep 23, 2026
N/A· v4
8.7 HIGH· v3
N/A· v2
A flaw was found in Red Hat Ansible Automation Platform's automation- controller. The setting that formats the log message emitted for API 4XX errors is an administrator-controlled Python format-string template that is r...Show more
A flaw was found in Red Hat Ansible Automation Platform's automation- controller. The setting that formats the log message emitted for API 4XX errors is an administrator-controlled Python format-string template that is rendered with a live user object as an argument. Because Python string formatting permits attribute and item traversal on its arguments, an administrator can craft a template that walks from the user object into the application settings and reads the Django secret key and the database password. The formatted message is written to a logger that can be forwarded to an external log aggregator, whose destination is also administrator-controlled, allowing the secrets to be sent off the host. An authenticated administrator can thereby obtain the master encryption key used to protect all stored credentials and the database service password, enabling offline decryption of every stored credential, forgery of user sessions, and direct access to the controller database.Show less
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Sep 22, 2026
Sep 22, 2026
9.2 CRITICAL· v4
N/A· v3
N/A· v2
Use of Externally-Controlled Format String vulnerability in RTI Connext Professional (Core Libraries) allows Format String Injection. This issue affects Connext Professional: from 7.5.0 before 7.7.0.1, from 7.3.0.10 befo...Show more
Use of Externally-Controlled Format String vulnerability in RTI Connext Professional (Core Libraries) allows Format String Injection. This issue affects Connext Professional: from 7.5.0 before 7.7.0.1, from 7.3.0.10 before 7.3.1.6.Show less
1Microsoft
7Windows 10 1607
Windows 10 1809Windows Server 2012+4 more
Sep 29, 2026
Sep 8, 2026
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Use of externally-controlled format string in Active Directory Certificate Services (AD CS) allows an authorized attacker to disclose information over a network.
1Hpe
1Arubaos Cx
Sep 4, 2026
Sep 1, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
A format string vulnerability exists in the command line interface of AOS-CX that could lead to unauthenticated remote code execution. Successful exploitation of this vulnerability results in the ability to execute arbit...Show more
A format string vulnerability exists in the command line interface of AOS-CX that could lead to unauthenticated remote code execution. Successful exploitation of this vulnerability results in the ability to execute arbitrary code as a privileged user on the underlying operating system.Show less
1Ibm
2Aix
Vios
Sep 2, 2026
Aug 28, 2026
N/A· v4
7.8 HIGH· v3
N/A· v2
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to gain elevated privileges due to a format string vulnerability.
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Sep 1, 2026
Aug 27, 2026
N/A· v4
8.2 HIGH· v3
N/A· v2
In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format specifiers. This can be used to reliably crash CodeMete...Show more
In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory and stack canaries. The attack works locally, for example by using cmu --set-proxy to set the proxy value, and remotely when combined with CVE-2026-81573 by setting General.ProxyServer and then triggering this vulnerability.Show less
1Openssl
1Openssl
Sep 11, 2026
Aug 25, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to `ERR_raise_data()`. Impact summary: A malicious or intercepted CMP endpoint can cra...Show more
Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to `ERR_raise_data()`. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate whose subject becomes the default expected sender. CWE: CWE-134 (Use of Externally-Controlled Format String) Description: When validating a received CMP message, ossl_cmp_msg_check_update() converts the peer-supplied sender distinguished name with X509_NAME_oneline() and passes it directly as the format argument to ERR_raise_data(). Percent characters survive the conversion, so a sender DN such as "CN=%s%n" reaches BIO_vsnprintf() as an attacker-controlled format string with no matching variadic arguments. This path is only reached when the caller configures an expected sender or pins a server certificate, which is the normal configuration for a CMP client validating server responses. Since the attacker controls the format string but none of the variadic arguments, such specifiers as %s and %n dereference or write through unrelated stack contents and crash the client. The reliable consequence is a denial of service, when the response comes from a malicious or intercepted CMP endpoint. There is no controlled memory write, arbitrary-address read, or reliable path to remote code execution. FIPS impact: no No FIPS modules are affected by this issue, as the CMP protocol implementation is outside the OpenSSL FIPS module boundary.Show less
1Ibm
2Aix
Vios
Aug 25, 2026
Aug 20, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a format string vulnerability.