CVE Explorer
CVE-2026-6242
An authenticated format string vulnerability exists in the ONVIF Subscribe service in Tapo C520WS v2 due to improper handling of externally supplied parameters within formatting functions. An attacker may inject crafted format strings into event subscription requests or notification generation path to disrupt normal service execution.
Successful exploitation may cause the event notification service to terminate unexpectedly, resulting in the loss of real-time alarm functionality and disruption
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Tapo C520WS v2","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.2.6 Build 260528","status":"affected","version":"0","versionType":"custom"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:de142528d7a5cbc653b77db52ab5a90877bf43e169bbab9cb3f450eead041ae7 · sha256:f364afa9da89de1f… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":6.8,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:de142528d7a5cbc653b77db52ab5a90877bf43e169bbab9cb3f450eead041ae7 · sha256:f364afa9da89de1f… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-134","description":"CWE-134 Use of Externally-Controlled format string","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:de142528d7a5cbc653b77db52ab5a90877bf43e169bbab9cb3f450eead041ae7 · sha256:f364afa9da89de1f… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:de142528d7a5cbc653b77db52ab5a90877bf43e169bbab9cb3f450eead041ae7 · sha256:f364afa9da89de1f… · /containers/cna/references/1
{"tags":["patch"],"url":"https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:de142528d7a5cbc653b77db52ab5a90877bf43e169bbab9cb3f450eead041ae7 · sha256:f364afa9da89de1f… · /containers/cna/references/0
{"tags":["vendor-advisory"],"url":"https://www.tp-link.com/us/support/faq/5120/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:de142528d7a5cbc653b77db52ab5a90877bf43e169bbab9cb3f450eead041ae7 · sha256:f364afa9da89de1f… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.