Vulnerability-Lookup

VAR-202508-0674

Vulnerability from variot - Updated: 2025-08-29 23:24

A vulnerability was identified in Tenda AC20 up to 16.03.08.12. Affected by this vulnerability is the function strcpy of the file /goform/saveParentControlInfo. The manipulation of the argument Time leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The Tenda AC20 is a wireless router from the Chinese company Tenda.

The Tenda AC20 suffers from a buffer overflow vulnerability caused by a failure to properly validate the length of input data in the "Time" parameter in the file /goform/saveParentControlInfo. This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service (DoS)

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CVE-2025-8940 (GCVE-0-2025-8940)

Vulnerability from cvelistv5 – Published: 2025-08-14 05:32 – Updated: 2025-08-15 12:58

Title

Tenda AC20 saveParentControlInfo strcpy buffer overflow

Summary

Severity ?

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

8.8 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

CWE

CWE-120 - Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB

References

URL

Tags

	https://vuldb.com/?id.319903	vdb-entrytechnical-description
	https://vuldb.com/?ctiid.319903	signaturepermissions-required
	https://vuldb.com/?submit.631836	third-party-advisory
	https://github.com/lin-3-start/lin-cve/blob/main/…	related
	https://github.com/lin-3-start/lin-cve/blob/main/…	exploit
	https://www.tenda.com.cn/	product

Impacted products

	Vendor	Product	Version
	Tenda	AC20	Affected: 16.03.08.0 Affected: 16.03.08.1 Affected: 16.03.08.2 Affected: 16.03.08.3 Affected: 16.03.08.4 Affected: 16.03.08.5 Affected: 16.03.08.6 Affected: 16.03.08.7 Affected: 16.03.08.8 Affected: 16.03.08.9 Affected: 16.03.08.10 Affected: 16.03.08.11 Affected: 16.03.08.12

Credits

QMSSDXN (VulDB User)

Show details on NVD website

JSON

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          "url": "https://vuldb.com/?submit.631836"
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        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md#poc"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.tenda.com.cn/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-08-13T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2025-08-13T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2025-08-13T14:06:46.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Tenda AC20 saveParentControlInfo strcpy buffer overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-8940",
    "datePublished": "2025-08-14T05:32:11.901Z",
    "dateReserved": "2025-08-13T12:01:39.751Z",
    "dateUpdated": "2025-08-15T12:58:09.232Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

VAR-202508-0674

CVE-2025-8940 (GCVE-0-2025-8940)

Tags

Sightings

Nomenclature