CVE-2026-7748

🗓️ 04 May 2026 08:30:14Reported by VulDBType

cve🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 69 Views🌐 WEB

Remote buffer overflow in Totolink N300RH setUpgradeFW via cstecgi.cgi when FileName manipulated.

Reporter	Title	Published	Views	Family All 12
attackerkb	CVE-2026-7748	4 May 202608:30	–	attackerkb
BDU FSTEC	TOTOLINK N300RH Router setUpgradeFW() Code Execution	5 May 202600:00	–	bdu_fstec
Circl	CVE-2026-7748	4 May 202610:28	–	circl
CNNVD	TOTOLINK N300RH Buffer Error Vulnerability	4 May 202600:00	–	cnnvd
CNVD	TOTOLINK N300RH buffer overflow vulnerability (CNVD-2026-32746)	6 May 202600:00	–	cnvd
Cvelist	CVE-2026-7748 Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflow	4 May 202608:30	–	cvelist
EUVD	EUVD-2026-26939	4 May 202608:30	–	euvd
NVD	CVE-2026-7748	4 May 202610:16	–	nvd
Positive Technologies	PT-2026-36793	17 Apr 202600:00	–	ptsecurity
Rapid7 Vulnerability Database (full)	CVE-2026-7748: Buffer Copy without Checking Size of Input	4 May 202600:00	–	rapid7

Vulners

Node

totolink n300rhMatch3.2.4-b20220812

[
  {
    "vendor": "Totolink",
    "product": "N300RH",
    "versions": [
      {
        "version": "3.2.4-B20220812",
        "status": "affected"
      }
    ],
    "cpes": [
      "cpe:2.3:o:totolink:n300rh_firmware:*:*:*:*:*:*:*:*"
    ],
    "modules": [
      "POST Request Handler"
    ]
  }
]

Source	Link
vuldb	www.vuldb.com/vuln/360923/cti
vuldb	www.vuldb.com/submit/807202
totolink	www.totolink.net/
lavender-bicycle-a5a	www.lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setUpgradeFW-34553a41781f80abb1d1c627d7ff4329
vuldb	www.vuldb.com/vuln/360923

Parameter	Position	Path	Description	CWE
FileName	request body	/cgi-bin/cstecgi.cgi	A buffer overflow vulnerability exists in the setUpgradeFW function of the POST Request Handler when processing the FileName argument.	CWE-119, CWE-120

26 Oct 2026 19:10Current

8High risk

Vulners AI Score8

CVSS 48.7

CVSS 3.18.8

CVSS 38.8

CVSS 29

EPSS0.00463

SSVC