CVE-2021-20090
Vulnerability from cvelistv5
Published
2021-04-29 00:00
Modified
2025-02-06 20:25
Severity ?
EPSS score ?
Summary
A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.
References
▼ | URL | Tags | |
---|---|---|---|
vulnreport@tenable.com | https://www.kb.cert.org/vuls/id/914124 | Third Party Advisory, US Government Resource | |
vulnreport@tenable.com | https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/ | Exploit, Third Party Advisory | |
vulnreport@tenable.com | https://www.tenable.com/security/research/tra-2021-13 | Exploit, Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://www.kb.cert.org/vuls/id/914124 | Third Party Advisory, US Government Resource | |
af854a3a-2127-422b-91ae-364da2661108 | https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/ | Exploit, Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://www.tenable.com/security/research/tra-2021-13 | Exploit, Third Party Advisory |
Impacted products
Vendor | Product | Version | ||
---|---|---|---|---|
n/a | Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 |
Version: WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24 |
CISA Known exploited vulnerability
Data from the Known Exploited Vulnerabilities Catalog
Date added: 2021-11-03
Due date: 2021-11-17
Required action: Apply updates per vendor instructions.
Used in ransomware: Unknown
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-20090
{ containers: { adp: [ { providerMetadata: { dateUpdated: "2024-08-03T17:30:07.572Z", orgId: "af854a3a-2127-422b-91ae-364da2661108", shortName: "CVE", }, references: [ { tags: [ "x_transferred", ], url: "https://www.tenable.com/security/research/tra-2021-13", }, { name: "VU#914124", tags: [ "third-party-advisory", "x_transferred", ], url: "https://www.kb.cert.org/vuls/id/914124", }, { tags: [ "x_transferred", ], url: "https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/", }, ], title: "CVE Program Container", }, { metrics: [ { cvssV3_1: { attackComplexity: "LOW", attackVector: "NETWORK", availabilityImpact: "HIGH", baseScore: 9.8, baseSeverity: "CRITICAL", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "NONE", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", version: "3.1", }, }, { other: { content: { id: "CVE-2021-20090", options: [ { Exploitation: "active", }, { Automatable: "yes", }, { "Technical Impact": "total", }, ], role: "CISA Coordinator", timestamp: "2025-02-06T20:25:22.891349Z", version: "2.0.3", }, type: "ssvc", }, }, { other: { content: { dateAdded: "2021-11-03", reference: "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-20090", }, type: "kev", }, }, ], problemTypes: [ { descriptions: [ { cweId: "CWE-22", description: "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", lang: "en", type: "CWE", }, ], }, ], providerMetadata: { dateUpdated: "2025-02-06T20:25:29.587Z", orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0", shortName: "CISA-ADP", }, title: "CISA ADP Vulnrichment", }, ], cna: { affected: [ { product: "Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3", vendor: "n/a", versions: [ { status: "affected", version: "WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24", }, ], }, ], descriptions: [ { lang: "en", value: "A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.", }, ], problemTypes: [ { descriptions: [ { description: "Path Traversal", lang: "en", type: "text", }, ], }, ], providerMetadata: { dateUpdated: "2023-10-18T11:29:20.400Z", orgId: "5ac1ecc2-367a-4d16-a0b2-35d495ddd0be", shortName: "tenable", }, references: [ { url: "https://www.tenable.com/security/research/tra-2021-13", }, { name: "VU#914124", tags: [ "third-party-advisory", ], url: "https://www.kb.cert.org/vuls/id/914124", }, { url: "https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/", }, ], }, }, cveMetadata: { assignerOrgId: "5ac1ecc2-367a-4d16-a0b2-35d495ddd0be", assignerShortName: "tenable", cveId: "CVE-2021-20090", datePublished: "2021-04-29T00:00:00.000Z", dateReserved: "2020-12-17T00:00:00.000Z", dateUpdated: "2025-02-06T20:25:29.587Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", "vulnerability-lookup:meta": { cisa_known_exploited: { cveID: "CVE-2021-20090", cwes: "[\"CWE-22\"]", dateAdded: "2021-11-03", dueDate: "2021-11-17", knownRansomwareCampaignUse: "Unknown", notes: "https://nvd.nist.gov/vuln/detail/CVE-2021-20090", product: "Buffalo Firmware", requiredAction: "Apply updates per vendor instructions.", shortDescription: "Arcadyan Buffalo firmware contains a path traversal vulnerability that could allow unauthenticated, remote attackers to bypass authentication and access sensitive information. This vulnerability affects multiple routers across several different vendors.", vendorProject: "Arcadyan", vulnerabilityName: "Arcadyan Buffalo Firmware Path Traversal Vulnerability", }, nvd: "{\"cve\":{\"id\":\"CVE-2021-20090\",\"sourceIdentifier\":\"vulnreport@tenable.com\",\"published\":\"2021-04-29T15:15:10.630\",\"lastModified\":\"2025-03-19T20:56:01.547\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de salto de ruta en las interfaces web de Buffalo WSR-2533DHPL2 versión de firmware anterior a 1.02 e incluyéndola y WSR-2533DHP3 versión de firmware anterior a 1.24 e incluyéndola, podría permitir a atacantes remotos no autenticados omitir la autenticación\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":7.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":10.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"cisaExploitAdd\":\"2021-11-03\",\"cisaActionDue\":\"2021-11-17\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Arcadyan Buffalo Firmware Path Traversal Vulnerability\",\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:buffalo:wsr-2533dhpl2-bk_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"1.02\",\"matchCriteriaId\":\"D861729C-023B-4D73-8C4C-BF7E8B0B7045\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:buffalo:wsr-2533dhpl2-bk:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1B03FA14-33E3-44D2-8165-197CB446F2D2\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:buffalo:wsr-2533dhp3-bk_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"1.24\",\"matchCriteriaId\":\"63232EC8-B2B8-4867-93DB-C0C5147E2730\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:buffalo:wsr-2533dhp3-bk:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7AA91D93-E2B9-4415-B541-1968F1F39814\"}]}]}],\"references\":[{\"url\":\"https://www.kb.cert.org/vuls/id/914124\",\"source\":\"vulnreport@tenable.com\",\"tags\":[\"Third Party Advisory\",\"US Government Resource\"]},{\"url\":\"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/\",\"source\":\"vulnreport@tenable.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/research/tra-2021-13\",\"source\":\"vulnreport@tenable.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.kb.cert.org/vuls/id/914124\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"US Government Resource\"]},{\"url\":\"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/research/tra-2021-13\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]}]}}", vulnrichment: { containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.tenable.com/security/research/tra-2021-13\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.kb.cert.org/vuls/id/914124\", \"name\": \"VU#914124\", \"tags\": [\"third-party-advisory\", \"x_transferred\"]}, {\"url\": \"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T17:30:07.572Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-20090\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-06T20:25:22.891349Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2021-11-03\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-20090\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-22\", \"description\": \"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-06T20:24:37.327Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3\", \"versions\": [{\"status\": \"affected\", \"version\": \"WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24\"}]}], \"references\": [{\"url\": \"https://www.tenable.com/security/research/tra-2021-13\"}, {\"url\": \"https://www.kb.cert.org/vuls/id/914124\", \"name\": \"VU#914124\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"Path Traversal\"}]}], \"providerMetadata\": {\"orgId\": \"5ac1ecc2-367a-4d16-a0b2-35d495ddd0be\", \"shortName\": \"tenable\", \"dateUpdated\": \"2023-10-18T11:29:20.400Z\"}}}", cveMetadata: "{\"cveId\": \"CVE-2021-20090\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-02-06T20:25:29.587Z\", \"dateReserved\": \"2020-12-17T00:00:00.000Z\", \"assignerOrgId\": \"5ac1ecc2-367a-4d16-a0b2-35d495ddd0be\", \"datePublished\": \"2021-04-29T00:00:00.000Z\", \"assignerShortName\": \"tenable\"}", dataType: "CVE_RECORD", dataVersion: "5.1", }, }, }
Log in or create an account to share your comment.
Security Advisory comment format.
This schema specifies the format of a comment related to a security advisory.
Title of the comment
Description of the comment
Loading…
Loading…
Loading…
Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.