CVE-2025-3786Public exploitNetwork attack vector

Authenticated service crash via unbounded repeater copy

Published Apr 18, 2025 · Updated Apr 18, 2025

Buffer overflow in Tenda AC15 15.03.05.19 and earlier allows remote authenticated users to crash its management service via a crafted mac value. The public submission identifies an unbounded strcpy(tkip_aes, tkip_aes_1) operation, while the CNA record identifies mac as the attacker-controlled request parameter. Network access and a low-privilege management session are required; successful triggering interrupts the router's management service.

CVSS severity8.7
High
EPSS probability1.11%
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 AC15 15.03.05.19 and earlier allows remote authenticated users to crash its management service via a crafted mac value. The public submission identifies an unbounded strcpy(tkip_aes, tkip_aes_1) operation, while the CNA record identifies mac as the attacker-controlled request parameter. Network access and a low-privilege management session are required; successful triggering interrupts the router's management service.

The record

CVE
CVE-2025-3786
Published
Apr 18, 2025
Updated
Apr 18, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC15
Classifications
CWE-120, CWE-119, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

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

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=15.03.05.0
  2. Affected versionversion=15.03.05.1
  3. Affected versionversion=15.03.05.10
  4. Affected versionversion=15.03.05.11
  5. Affected versionversion=15.03.05.12
  6. Affected versionversion=15.03.05.13
  7. Affected versionversion=15.03.05.14
  8. Affected versionversion=15.03.05.15
  9. Affected versionversion=15.03.05.16
  10. Affected versionversion=15.03.05.17
  11. Affected versionversion=15.03.05.18
  12. Affected versionversion=15.03.05.19
  13. Affected versionversion=15.03.05.2
  14. Affected versionversion=15.03.05.3
  15. Affected versionversion=15.03.05.4
  16. Affected versionversion=15.03.05.5
  17. Affected versionversion=15.03.05.6
  18. Affected versionversion=15.03.05.7
  19. Affected versionversion=15.03.05.8
  20. Affected versionversion=15.03.05.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC15version=15.03.05.0; version=15.03.05.1; version=15.03.05.10; version=15.03.05.11; version=15.03.05.12; version=15.03.05.13; version=15.03.05.14; version=15.03.05.15; version=15.03.05.16; version=15.03.05.17; version=15.03.05.18; version=15.03.05.19; version=15.03.05.2; version=15.03.05.3; version=15.03.05.4; version=15.03.05.5; version=15.03.05.6; version=15.03.05.7; version=15.03.05.8; version=15.03.05.9

Published CVSS scores

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
9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C
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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1210Exploitation of Remote Services

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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