CVE-2025-11091 (GCVE-0-2025-11091)

Vulnerability from cvelistv5 – Published: 2025-09-28 01:32 – Updated: 2025-09-29 14:48
VLAI
Title
Tenda AC21 SetStaticRouteCfg sscanf buffer overflow
Summary
A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-29 14:48 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3855 records in the last 180 days details
References
URL Tags
https://vuldb.com/?id.326173 vdb-entrytechnical-description
https://vuldb.com/?ctiid.326173 signaturepermissions-required
https://vuldb.com/?submit.661806 third-party-advisory
https://github.com/maximdevere/CVE2/issues/2 exploitissue-tracking
https://www.tenda.com.cn/ product
Impacted products
Vendor Product Version CPE status
Tenda AC21 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
Affected: 16.03.08.13
Affected: 16.03.08.14
Affected: 16.03.08.15
Affected: 16.03.08.16
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Show details on NVD website

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              "value": "A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited."
            },
            {
              "lang": "de",
              "value": "Es wurde eine Schwachstelle in Tenda AC21 up to 16.03.08.16 entdeckt. Dabei geht es um die Funktion sscanf der Datei /goform/SetStaticRouteCfg. Dank Manipulation des Arguments list mit unbekannten Daten kann eine buffer overflow-Schwachstelle ausgenutzt werden. Der Angriff l\u00e4sst sich \u00fcber das Netzwerk starten. Der Exploit ist \u00f6ffentlich verf\u00fcgbar und k\u00f6nnte genutzt werden."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "baseScore": 8.7,
                "baseSeverity": "HIGH",
                "vectorString": "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",
                "version": "4.0"
              }
            },
            {
              "cvssV3_1": {
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "vectorString": "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",
                "version": "3.1"
              }
            },
            {
              "cvssV3_0": {
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "vectorString": "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",
                "version": "3.0"
              }
            },
            {
              "cvssV2_0": {
                "baseScore": 9,
                "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR",
                "version": "2.0"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-120",
                  "description": "Buffer Overflow",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-119",
                  "description": "Memory Corruption",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-09-28T01:32:10.696Z",
            "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
            "shortName": "VulDB"
          },
          "references": [
            {
              "name": "VDB-326173 | Tenda AC21 SetStaticRouteCfg sscanf buffer overflow",
              "tags": [
                "vdb-entry",
                "technical-description"
              ],
              "url": "https://vuldb.com/?id.326173"
            },
            {
              "name": "VDB-326173 | CTI Indicators (IOB, IOC, IOA)",
              "tags": [
                "signature",
                "permissions-required"
              ],
              "url": "https://vuldb.com/?ctiid.326173"
            },
            {
              "name": "Submit #661806 | Shenzhen Tenda Technology Co.,Ltd. AC21 \u003c= V16.03.08.16 Buffer Overflow",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/?submit.661806"
            },
            {
              "tags": [
                "exploit",
                "issue-tracking"
              ],
              "url": "https://github.com/maximdevere/CVE2/issues/2"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://www.tenda.com.cn/"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2025-09-27T00:00:00.000Z",
              "value": "Advisory disclosed"
            },
            {
              "lang": "en",
              "time": "2025-09-27T02:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2025-09-27T07:31:48.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "Tenda AC21 SetStaticRouteCfg sscanf buffer overflow"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2025-11091",
        "datePublished": "2025-09-28T01:32:10.696Z",
        "dateReserved": "2025-09-27T05:26:44.839Z",
        "dateUpdated": "2025-09-29T14:48:57.508Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.