CVE-2020-29557

An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.

CVSS v3 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://shaqed.github.io/dlink/	Broken Link Exploit Third Party Advisory
https://www.dlink.ru/ru/download2/5/19/2354/441/	Product
https://shaqed.github.io/dlink/	Broken Link Exploit Third Party Advisory
https://www.dlink.ru/ru/download2/5/19/2354/441/	Product
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557	US Government Resource

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:dlink:dir-825_r1_firmware:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:dlink:dir-825:r1:::::::*
	cpe:2.3:h:dlink:dir-825\/a:d1a:::::::*
	cpe:2.3:h:dlink:dir-825\/ac:e:::::::*
	cpe:2.3:h:dlink:dir-825\/ac:e1a:::::::*
	cpe:2.3:h:dlink:dir-825\/acf:f1:::::::*
	cpe:2.3:h:dlink:dir-825\/gf:gf:::::::*

History

07 Nov 2025, 22:03

Type	Values Removed	Values Added
References	~~() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557 -~~	() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557 - US Government Resource

Information

Published : 2021-01-29 20:15

Updated : 2025-11-07 22:03

NVD link : CVE-2020-29557

Mitre link : CVE-2020-29557

CVE.ORG link : CVE-2020-29557

JSON object : View

Products Affected

dlink

dir-825\/a
dir-825_r1_firmware
dir-825\/ac
dir-825\/gf
dir-825
dir-825\/acf

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

{"id": "CVE-2020-29557", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "[email protected]", "cvssData": {"version": "2.0", "baseScore": 10.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "cvssData": {"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"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"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"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-01-29T20:15:12.933", "references": [{"url": "https://shaqed.github.io/dlink/", "tags": ["Broken Link", "Exploit", "Third Party Advisory"], "source": "[email protected]"}, {"url": "https://www.dlink.ru/ru/download2/5/19/2354/441/", "tags": ["Product"], "source": "[email protected]"}, {"url": "https://shaqed.github.io/dlink/", "tags": ["Broken Link", "Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.dlink.ru/ru/download2/5/19/2354/441/", "tags": ["Product"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-119"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution."}, {"lang": "es", "value": "Se detect\u00f3 un problema en los dispositivos D-Link DIR-825 R1 versiones hasta 3.0.1 antes del 20-11-2020. Un desbordamiento del b\u00fafer en la interfaz web permite a atacantes lograr una ejecuci\u00f3n de c\u00f3digo remota antes de la autenticaci\u00f3n"}], "lastModified": "2025-11-07T22:03:20.813", "cisaActionDue": "2022-05-03", "cisaExploitAdd": "2021-11-03", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:dlink:dir-825_r1_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "34DB7F07-2D64-4532-BF64-28BA4B19ED89", "versionEndIncluding": "3.0.1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:dlink:dir-825:r1:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "20E00B08-C149-4F58-8D9F-70F51094ABA4"}, {"criteria": "cpe:2.3:h:dlink:dir-825\\/a:d1a:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D166832F-323A-4D97-A0BC-BC1C5FFABC15"}, {"criteria": "cpe:2.3:h:dlink:dir-825\\/ac:e:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "31A2917E-3DD9-4744-B46B-D82119DC986F"}, {"criteria": "cpe:2.3:h:dlink:dir-825\\/ac:e1a:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "8723A1A3-66F8-4393-8AD2-799E6960058D"}, {"criteria": "cpe:2.3:h:dlink:dir-825\\/acf:f1:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "60BA2C90-EF68-4AC3-B09C-7CECDE2A891E"}, {"criteria": "cpe:2.3:h:dlink:dir-825\\/gf:gf:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "AB58664E-6140-4B48-988E-C13391AC7166"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "[email protected]", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "D-Link DIR-825 R1 Devices Buffer Overflow Vulnerability"}