CVE-2026-4975Public exploitNetwork attack vector

Authenticated memory corruption via unbounded sprintf

Published Mar 27, 2026 · Updated Mar 27, 2026

Stack overflow in Tenda AC15 15.03.05.19 allows remote authenticated users to overwrite stack memory through a crafted POST request. In formSetCfm at /goform/setcfm, sub_2BA8C uses sprintf to place attacker-controlled funcpara1 in a fixed 64-byte stack array without a bound. The authenticated request reaches the vulnerable handler; the published artifact demonstrates the overflow trigger but does not establish code execution.

CVSS severity8.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tenda AC15 15.03.05.19 allows remote authenticated users to overwrite stack memory through a crafted POST request. In formSetCfm at /goform/setcfm, sub_2BA8C uses sprintf to place attacker-controlled funcpara1 in a fixed 64-byte stack array without a bound. The authenticated request reaches the vulnerable handler; the published artifact demonstrates the overflow trigger but does not establish code execution.

The record

CVE
CVE-2026-4975
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC15
Classifications
CWE-121, CWE-787, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2026Record 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=15.03.05.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC15version=15.03.05.19

Published CVSS scores

7.4VulDBCVSS: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
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

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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