Search
Find a vulnerability
Search criteria
2 vulnerabilities by DD-WRT
CVE-2021-27137 (GCVE-0-2021-27137)
Vulnerability from cvelistv5 – Published: 2026-07-16 00:00 – Updated: 2026-07-22 03:55
VLAI
EPSS
VEX
Summary
An issue was discovered in router/upnp/src/ssdp.c in DD-WRT before 45724. An unsafe strcpy in the UPnP handling functionality allows an unauthenticated remote attacker to send a request that would overflow an internal fixed buffer. Exploitation requires the DD-WRT user to enable UPnP (which is off by default, and only listens on internal interfaces by default). This occurs in ssdp_msearch (reachable by an M-SEARCH request).
Severity
8.1 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 00:00 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
mitre
CNA
References
6 references
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-27137",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-21T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2026-07-21",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27137"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-22T03:55:45.793Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/"
},
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27137"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-07-21T00:00:00.000Z",
"value": "CVE-2021-27137 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "DD-WRT",
"vendor": "DD-WRT",
"versions": [
{
"lessThan": "45724",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:dd-wrt:dd-wrt:*:*:*:*:*:*:*:*",
"versionEndExcluding": "45724",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in router/upnp/src/ssdp.c in DD-WRT before 45724. An unsafe strcpy in the UPnP handling functionality allows an unauthenticated remote attacker to send a request that would overflow an internal fixed buffer. Exploitation requires the DD-WRT user to enable UPnP (which is off by default, and only listens on internal interfaces by default). This occurs in ssdp_msearch (reachable by an M-SEARCH request)."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-121",
"description": "CWE-121 Stack-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T17:38:47.947Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://svn.dd-wrt.com/changeset/45724"
},
{
"url": "https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/"
},
{
"url": "https://securityaffairs.com/193290/uncategorized/iot-botnet-c0xmo-adds-competitor-killing-capability.html"
},
{
"url": "https://www.bleepingcomputer.com/news/security/c0xmo-botnet-spreads-via-dd-wrt-router-flaw-kills-rival-malware/"
},
{
"url": "https://www.fortinet.com/blog/threat-research/inside-cross-platform-propagation-of-new-gafgyt-variant-c0xmo"
}
],
"x_generator": {
"engine": "enrichogram 0.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2021-27137",
"datePublished": "2026-07-16T00:00:00.000Z",
"dateReserved": "2021-02-10T00:00:00.000Z",
"dateUpdated": "2026-07-22T03:55:45.793Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2022-27631 (GCVE-0-2022-27631)
Vulnerability from cvelistv5 – Published: 2022-08-05 21:19 – Updated: 2025-04-15 18:53
VLAI
EPSS
VEX
Summary
A memory corruption vulnerability exists in the httpd unescape functionality of DD-WRT Revision 32270 - Revision 48599. A specially-crafted HTTP request can lead to memory corruption. An attacker can send a network request to trigger this vulnerability.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-15 18:18 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
talos
CNA
References
1 reference
Impacted products
Date Public
2022-07-27 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T05:32:59.790Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1510"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2022-27631",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-04-15T18:18:42.739291Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-04-15T18:53:26.678Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "DD-WRT",
"vendor": "DD-WRT",
"versions": [
{
"status": "affected",
"version": "Revision 32270 - Revision 48599"
}
]
}
],
"datePublic": "2022-07-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A memory corruption vulnerability exists in the httpd unescape functionality of DD-WRT Revision 32270 - Revision 48599. A specially-crafted HTTP request can lead to memory corruption. An attacker can send a network request to trigger this vulnerability."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-10-07T00:00:00.000Z",
"orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"shortName": "talos"
},
"references": [
{
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1510"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"assignerShortName": "talos",
"cveId": "CVE-2022-27631",
"datePublished": "2022-08-05T21:19:29.848Z",
"dateReserved": "2022-04-05T00:00:00.000Z",
"dateUpdated": "2025-04-15T18:53:26.678Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}