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Two high-severity vulnerabilities have been disclosed in Tenda AC15 router firmware, both involving stack-based buffer overflows in web management handlers that are reachable through crafted POST requests. CVE-2026-4975 affects firmware version 15.03.05.19 in the formSetCfm function behind the /goform/setcfm endpoint, where manipulation of the funcpara1 parameter can corrupt memory and potentially allow remote compromise of the device.
A second flaw, CVE-2026-5830, affects Tenda AC15 version 15.03.05.18 in the websGetVar function used by /goform/SysToolChangePwd; crafted oldPwd, newPwd, or cfmPwd values can trigger another stack-based overflow. Both issues are classified under CWE-119 and CWE-121, carry high-impact severity ratings for confidentiality, integrity, and availability, and have been publicly disclosed, with the latter report explicitly noting that a public exploit is available.
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2 events from the most recent confirmed update back to the earliest known activity.
VulDB received CVE-2026-5830 for a Tenda AC15 15.03.05.18 vulnerability in the /goform/SysToolChangePwd endpoint on April 9, 2026. The issue involves stack-based buffer overflow via the oldPwd, newPwd, or cfmPwd parameters in websGetVar, and the entry states that a public exploit is available.
A vulnerability affecting Tenda AC15 firmware 15.03.05.19 was recorded as CVE-2026-4975. The flaw in the /goform/setcfm POST handler's formSetCfm function can be triggered via the funcpara1 argument to cause a remotely exploitable stack-based buffer overflow, and it had already been publicly disclosed by the time of publication.
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Two high-severity vulnerabilities have been disclosed in Tenda router firmware, affecting **Tenda AC5** version `15.03.06.47` and **Tenda AC6** version `15.03.05.16`. The flaws reside in the `formQuickIndex` function behind the `/goform/QuickIndex` POST request handler, where improper handling of the `PPPOEPassword` parameter can trigger a **stack-based buffer overflow**. Both issues are tracked as `CVE-2026-4903` for AC5 and `CVE-2026-4961` for AC6. The vulnerabilities are described as **remotely exploitable**, with **public exploits available**, raising the risk of real-world attacks against exposed devices. The entries map the weaknesses to `CWE-119` and `CWE-121`, and their published CVSS vectors indicate high impact across **confidentiality, integrity, and availability**, making these flaws significant for organizations or users still operating the affected firmware.
Jun 29, 2026
Two high-severity vulnerabilities have been disclosed in Tenda router firmware, affecting **FH451 1.0.0.9** and **F453 1.0.0.3**. The flaws are tracked as `CVE-2026-4534` and `CVE-2026-4552` and both involve remotely reachable stack-based buffer overflows in web management handlers. In the FH451 case, the issue is in the `formWrlExtraSet` function exposed through the `/goform/WrlExtraSet` component, where manipulation of the `GO` argument can trigger memory corruption. In the F453 case, the vulnerable code is the `fromVirtualSer` function behind the `/goform/VirtualSer` endpoint, where the `page` argument can be abused to cause a similar overflow. Both CVE records indicate that **public exploits are available**, increasing the likelihood of opportunistic attacks against exposed devices. The disclosures map the weaknesses to `CWE-119` and `CWE-121`, reflecting out-of-bounds memory handling and stack-based buffer overflow conditions, and the published scoring points to high impact on confidentiality, integrity, and availability. Organizations using these Tenda models should treat the flaws as urgent remote compromise risks, especially where router administration interfaces are internet-accessible.
Jun 29, 2026
Two high-severity vulnerabilities, **CVE-2026-6122** and **CVE-2026-6136**, were disclosed for **Tenda F451** routers, both affecting firmware `1.0.0.7` and enabling **remote stack-based buffer overflow** attacks through the device's `httpd` web interface. The flaws reside in the `/goform/L7Prot` and `/goform/L7Im` endpoints, specifically in the `frmL7ProtForm` and `frmL7ImForm` functions, where improper handling of the `page` argument can corrupt stack memory. Both CVEs are mapped to **CWE-119** and **CWE-121**, and the disclosures indicate that **public exploit details are already available**, raising the risk of near-term exploitation against exposed devices. One advisory notes the issue requires only **low privileges** for exploitation, and both entries describe the attack path as remote, making internet-accessible or poorly segmented Tenda F451 deployments a likely target for abuse.
Jun 29, 2026