{"id":"CVE-2026-5363","state":"PUBLISHED","title":"Use of weak cryptographic key in TP-Link Archer C7","description":"Inadequate Encryption Strength vulnerability in TP-Link Archer C7 v5 and v5.8 (uhttpd modules) allows Password Recovery Exploitation. The web interface encrypts the admin password client-side using RSA-1024 before sending it to the router during login. \nAn adjacent attacker with the ability to intercept network traffic could potentially perform a brute-force or factorization attack against the 1024-bit RSA key to recover the plaintext administrator password, leading to unauthorized access and compromise of the device configuration.  This issue affects Archer C7: through Build 20220715.","publishedAt":"2026-04-15T23:45:54.271Z","updatedAt":"2026-04-16T23:10:46.170Z","severity":{"score":5.4,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P","source":"TPLink"},"assigner":"TPLink","products":["TP-Link Systems Inc. Archer C7 v5 and v5.8"],"affected":[{"vendor":"TP-Link Systems Inc.","product":"Archer C7 v5 and v5.8","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"Build 20220715","versionType":"custom"}],"modules":["uhttpd"]}],"references":["https://www.tp-link.com/us/support/faq/3562/"],"weaknesses":["CWE-326"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/5xxx/CVE-2026-5363.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-5363","state":"PUBLISHED","datePublished":"2026-04-15T23:45:54.271Z","dateUpdated":"2026-04-16T23:10:46.170Z","assignerShortName":"TPLink","assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","dateReserved":"2026-04-01T17:38:27.536Z"},"containers":{"cna":{"title":"Use of weak cryptographic key in TP-Link Archer C7","descriptions":[{"lang":"en","value":"Inadequate Encryption Strength vulnerability in TP-Link Archer C7 v5 and v5.8 (uhttpd modules) allows Password Recovery Exploitation. The web interface encrypts the admin password client-side using RSA-1024 before sending it to the router during login. \nAn adjacent attacker with the ability to intercept network traffic could potentially perform a brute-force or factorization attack against the 1024-bit RSA key to recover the plaintext administrator password, leading to unauthorized access and compromise of the device configuration.  This issue affects Archer C7: through Build 20220715."}],"affected":[{"vendor":"TP-Link Systems Inc.","product":"Archer C7 v5 and v5.8","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"Build 20220715","versionType":"custom"}],"modules":["uhttpd"]}],"references":[{"url":"https://www.tp-link.com/us/support/faq/3562/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.4,"vectorString":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-326","lang":"en","description":"CWE-326: Inadequate Encryption Strength","type":"CWE"}]}],"providerMetadata":{"shortName":"TPLink","orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","dateUpdated":"2026-04-16T23:10:46.170Z"},"impacts":[{"capecId":"CAPEC-50","descriptions":[{"lang":"en","value":"CAPEC-50 Password Recovery Exploitation"}]}],"tags":["unsupported-when-assigned"],"credits":[{"lang":"en","value":"Sérgio Silva (CYBERS3C)","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-16T13:17:25.657073Z","id":"CVE-2026-5363","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-16T13:17:48.532Z"}}]}}}