CWE-134
AllowedUse of Externally-Controlled Format String
Abstraction: Base · Status: Draft
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.
499 vulnerabilities reference this CWE, most recent first.
GHSA-P5QQ-XP46-54RC
Vulnerability from github – Published: 2022-05-14 01:35 – Updated: 2022-05-14 01:35A format string vulnerability in Fortinet FortiOS 5.6.0 allows attacker to execute unauthorized code or commands via the SSH username variable.
{
"affected": [],
"aliases": [
"CVE-2018-1352"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-02-08T18:29:00Z",
"severity": "CRITICAL"
},
"details": "A format string vulnerability in Fortinet FortiOS 5.6.0 allows attacker to execute unauthorized code or commands via the SSH username variable.",
"id": "GHSA-p5qq-xp46-54rc",
"modified": "2022-05-14T01:35:22Z",
"published": "2022-05-14T01:35:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1352"
},
{
"type": "WEB",
"url": "https://fortiguard.com/advisory/FG-IR-18-018"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P5WR-VP8G-Q5P4
Vulnerability from github – Published: 2018-07-12 14:45 – Updated: 2024-10-18 21:39Plone 4.x through 4.3.11 and 5.x through 5.0.6 allow remote attackers to bypass a sandbox protection mechanism and obtain sensitive information by leveraging the Python string format method.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "Plone"
},
"ranges": [
{
"events": [
{
"introduced": "4.0"
},
{
"fixed": "4.3.12"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 5.1a2"
},
"package": {
"ecosystem": "PyPI",
"name": "Plone"
},
"ranges": [
{
"events": [
{
"introduced": "5.1a1"
},
{
"fixed": "5.1b1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "Plone"
},
"ranges": [
{
"events": [
{
"introduced": "5.0rc1"
},
{
"fixed": "5.0.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2017-5524"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:48:01Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "Plone 4.x through 4.3.11 and 5.x through 5.0.6 allow remote attackers to bypass a sandbox protection mechanism and obtain sensitive information by leveraging the Python string format method.",
"id": "GHSA-p5wr-vp8g-q5p4",
"modified": "2024-10-18T21:39:21Z",
"published": "2018-07-12T14:45:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5524"
},
{
"type": "WEB",
"url": "https://github.com/plone/Products.CMFPlone/pull/1912"
},
{
"type": "WEB",
"url": "https://github.com/plone/Products.CMFPlone/commit/a7d47692058e10ce89968e7ca4dacbdf44fcad4f"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-p5wr-vp8g-q5p4"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2017-81.yaml"
},
{
"type": "WEB",
"url": "https://plone.org/security/hotfix/20170117/sandbox-escape"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2017/01/18/6"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/95679"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Plone Sandbox Escape"
}
GHSA-P666-CH8G-WP7W
Vulnerability from github – Published: 2026-01-02 15:30 – Updated: 2026-01-05 21:30A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to obtain secret data or modify memory.
We have already fixed the vulnerability in the following versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later
{
"affected": [],
"aliases": [
"CVE-2025-53591"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-02T15:16:01Z",
"severity": "LOW"
},
"details": "A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to obtain secret data or modify memory.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.7.3256 build 20250913 and later\nQuTS hero h5.2.7.3256 build 20250913 and later\nQuTS hero h5.3.1.3250 build 20250912 and later",
"id": "GHSA-p666-ch8g-wp7w",
"modified": "2026-01-05T21:30:30Z",
"published": "2026-01-02T15:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53591"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-25-50"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-P6GF-558M-R8Q3
Vulnerability from github – Published: 2022-09-07 00:01 – Updated: 2022-09-09 00:00A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.
{
"affected": [],
"aliases": [
"CVE-2022-34747"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-09-06T02:15:00Z",
"severity": "CRITICAL"
},
"details": "A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.",
"id": "GHSA-p6gf-558m-r8q3",
"modified": "2022-09-09T00:00:57Z",
"published": "2022-09-07T00:01:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-34747"
},
{
"type": "WEB",
"url": "https://www.zyxel.com/support/Zyxel-security-advisory-for-format-string-vulnerability-in-NAS.shtml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P73Q-X72G-C4G9
Vulnerability from github – Published: 2022-05-01 18:26 – Updated: 2022-05-01 18:26Format string vulnerability in the safe_bprintf function in acesrc/acebot_cmds.c in Alien Arena 2007 6.10 and earlier allows remote attackers to cause a denial of service (daemon crash) via format string specifiers in a nickname.
{
"affected": [],
"aliases": [
"CVE-2007-4754"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2007-09-08T01:17:00Z",
"severity": "HIGH"
},
"details": "Format string vulnerability in the safe_bprintf function in acesrc/acebot_cmds.c in Alien Arena 2007 6.10 and earlier allows remote attackers to cause a denial of service (daemon crash) via format string specifiers in a nickname.",
"id": "GHSA-p73q-x72g-c4g9",
"modified": "2022-05-01T18:26:55Z",
"published": "2022-05-01T18:26:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2007-4754"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/36463"
},
{
"type": "WEB",
"url": "http://aluigi.altervista.org/adv/aa2k7x-adv.txt"
},
{
"type": "WEB",
"url": "http://archives.neohapsis.com/archives/fulldisclosure/2007-09/0049.html"
},
{
"type": "WEB",
"url": "http://osvdb.org/40507"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/26819"
},
{
"type": "WEB",
"url": "http://securityreason.com/securityalert/3105"
},
{
"type": "WEB",
"url": "http://www.quakesrc.org/forums/viewtopic.php?t=6843\u0026start=1"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/478628/100/0/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/25559"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2007/3169"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-P83P-J7HQ-X97F
Vulnerability from github – Published: 2022-05-17 05:19 – Updated: 2022-05-17 05:19The silc_http_server_parse function in lib/silchttp/silchttpserver.c in the internal HTTP server in silcd in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.9 allows remote attackers to overwrite a stack location and possibly execute arbitrary code via a crafted Content-Length header, related to incorrect use of a %lu format string.
{
"affected": [],
"aliases": [
"CVE-2008-7160"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2009-09-10T21:30:00Z",
"severity": "MODERATE"
},
"details": "The silc_http_server_parse function in lib/silchttp/silchttpserver.c in the internal HTTP server in silcd in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.9 allows remote attackers to overwrite a stack location and possibly execute arbitrary code via a crafted Content-Length header, related to incorrect use of a %lu format string.",
"id": "GHSA-p83p-j7hq-x97f",
"modified": "2022-05-17T05:19:55Z",
"published": "2022-05-17T05:19:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2008-7160"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/36614"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/36625"
},
{
"type": "WEB",
"url": "http://silcnet.org/docs/changelog/SILC%20Toolkit%201.1.9"
},
{
"type": "WEB",
"url": "http://silcnet.org/general/news/news_toolkit.php"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2009/dsa-1879"
},
{
"type": "WEB",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:234"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2009/08/31/5"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2009/09/03/5"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/36194"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-P8QW-2Q25-J7X7
Vulnerability from github – Published: 2024-11-22 21:32 – Updated: 2025-09-23 15:31A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to obtain secret data or modify memory.
We have already fixed the vulnerability in the following versions: QTS 5.2.1.2930 build 20241025 and later QuTS hero h5.2.1.2929 build 20241025 and later
{
"affected": [],
"aliases": [
"CVE-2024-50400"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-22T16:15:33Z",
"severity": "LOW"
},
"details": "A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to obtain secret data or modify memory.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.1.2930 build 20241025 and later\nQuTS hero h5.2.1.2929 build 20241025 and later",
"id": "GHSA-p8qw-2q25-j7x7",
"modified": "2025-09-23T15:31:05Z",
"published": "2024-11-22T21:32:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50400"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-24-43"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-P9PF-5C8C-756M
Vulnerability from github – Published: 2022-05-02 03:23 – Updated: 2022-05-02 03:23Format string vulnerability in Fortinet FortiClient 3.0.614, and possibly earlier, allows local users to execute arbitrary code via format string specifiers in the VPN connection name.
{
"affected": [],
"aliases": [
"CVE-2009-1262"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2009-04-07T23:30:00Z",
"severity": "HIGH"
},
"details": "Format string vulnerability in Fortinet FortiClient 3.0.614, and possibly earlier, allows local users to execute arbitrary code via format string specifiers in the VPN connection name.",
"id": "GHSA-p9pf-5c8c-756m",
"modified": "2022-05-02T03:23:15Z",
"published": "2022-05-02T03:23:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2009-1262"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/49633"
},
{
"type": "WEB",
"url": "http://lists.grok.org.uk/pipermail/full-disclosure/2009-April/068583.html"
},
{
"type": "WEB",
"url": "http://osvdb.org/53266"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/34524"
},
{
"type": "WEB",
"url": "http://www.layereddefense.com/FortiClient02Apr.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/502354/100/0/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/502602/100/0/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/34343"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id?1021966"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2009/0941"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PCC5-98XF-VPFF
Vulnerability from github – Published: 2026-06-04 09:30 – Updated: 2026-06-04 21:31Leftover engineering diagnostics and factory-level diagnostic software remain exposed on retail builds, giving malicious apps write privileges to internal NVRAM registers.
{
"affected": [],
"aliases": [
"CVE-2026-50211"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-04T09:16:29Z",
"severity": "HIGH"
},
"details": "Leftover engineering diagnostics and factory-level diagnostic software remain exposed on retail builds, giving malicious apps write privileges to internal NVRAM registers.",
"id": "GHSA-pcc5-98xf-vpff",
"modified": "2026-06-04T21:31:21Z",
"published": "2026-06-04T09:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50211"
},
{
"type": "WEB",
"url": "https://community.acer.com/en/kb/articles/19707"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-PF44-6C4P-6MP7
Vulnerability from github – Published: 2022-10-25 19:00 – Updated: 2022-10-26 19:00A format string injection vulnerability exists in the XCMD getVarHA functionality of abode systems, inc. iota All-In-One Security Kit 6.9X and 6.9Z. A specially-crafted XCMD can lead to memory corruption, information disclosure, and denial of service. An attacker can send a malicious XML payload to trigger this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2022-35244"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-10-25T17:15:00Z",
"severity": "CRITICAL"
},
"details": "A format string injection vulnerability exists in the XCMD getVarHA functionality of abode systems, inc. iota All-In-One Security Kit 6.9X and 6.9Z. A specially-crafted XCMD can lead to memory corruption, information disclosure, and denial of service. An attacker can send a malicious XML payload to trigger this vulnerability.",
"id": "GHSA-pf44-6c4p-6mp7",
"modified": "2022-10-26T19:00:39Z",
"published": "2022-10-25T19:00:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-35244"
},
{
"type": "WEB",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1582"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
Choose a language that is not subject to this flaw.
Mitigation
Ensure that all format string functions are passed a static string which cannot be controlled by the user, and that the proper number of arguments are always sent to that function as well. If at all possible, use functions that do not support the %n operator in format strings. [REF-116] [REF-117]
Mitigation
Run compilers and linkers with high warning levels, since they may detect incorrect usage.
CAPEC-135: Format String Injection
An adversary includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An adversary can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the adversary can write to the program stack.
CAPEC-67: String Format Overflow in syslog()
This attack targets applications and software that uses the syslog() function insecurely. If an application does not explicitely use a format string parameter in a call to syslog(), user input can be placed in the format string parameter leading to a format string injection attack. Adversaries can then inject malicious format string commands into the function call leading to a buffer overflow. There are many reported software vulnerabilities with the root cause being a misuse of the syslog() function.