CVE-2025-4897Public exploitNetwork attack vector

Device crash via oversized POST form field

Published May 18, 2025 · Updated May 19, 2025

Buffer overflow in Tenda A15 firmware 15.13.07.09 and 15.13.07.13 allows remote attackers to crash the device with a crafted HTTP POST request. The /goform/multimodalAdd handler fails to bound an enormous attacker-controlled form field, filling device memory until the appliance crashes. The public proof of concept demonstrates a crash, while Check Point reports arbitrary code execution; published assessments conflict on whether authentication is required.

CVSS severity7.5
High
EPSS probability5.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Tenda A15 firmware 15.13.07.09 and 15.13.07.13 allows remote attackers to crash the device with a crafted HTTP POST request. The /goform/multimodalAdd handler fails to bound an enormous attacker-controlled form field, filling device memory until the appliance crashes. The public proof of concept demonstrates a crash, while Check Point reports arbitrary code execution; published assessments conflict on whether authentication is required.

The record

CVE
CVE-2025-4897
Published
May 18, 2025
Updated
May 19, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
A15
Classifications
CWE-119, CWE-120, T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. May 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=15.13.07.09
  2. Affected versionversion=15.13.07.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Shenzhen Tenda Technology Co., Ltd. · A15version=15.13.07.09; version=15.13.07.13

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C
8.7VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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