CVE-2025-8160Public exploitNetwork attack vector

Authenticated command execution via unchecked timeZone copy

Published Jul 25, 2025 · Updated Jul 25, 2025

Buffer overflow in AC20 httpd 16.03.08.12 and earlier allows remote authenticated users to execute commands via a crafted timeZone value. The SetSysTimeCfg handler copies the timeZone parameter into a fixed-size s_1 array without validating its length when timeType is sync. Access to the router management interface is required; exploitation can crash httpd or run attacker-supplied MIPS code on the appliance.

CVSS severity8.8
High
EPSS probability1.27%
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 AC20 httpd 16.03.08.12 and earlier allows remote authenticated users to execute commands via a crafted timeZone value. The SetSysTimeCfg handler copies the timeZone parameter into a fixed-size s_1 array without validating its length when timeType is sync. Access to the router management interface is required; exploitation can crash httpd or run attacker-supplied MIPS code on the appliance.

The record

CVE
CVE-2025-8160
Published
Jul 25, 2025
Updated
Jul 25, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC20
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=16.03.08.0
  2. Affected versionversion=16.03.08.1
  3. Affected versionversion=16.03.08.10
  4. Affected versionversion=16.03.08.11
  5. Affected versionversion=16.03.08.12
  6. Affected versionversion=16.03.08.2
  7. Affected versionversion=16.03.08.3
  8. Affected versionversion=16.03.08.4
  9. Affected versionversion=16.03.08.5
  10. Affected versionversion=16.03.08.6
  11. Affected versionversion=16.03.08.7
  12. Affected versionversion=16.03.08.8
  13. Affected versionversion=16.03.08.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC20version=16.03.08.0; version=16.03.08.1; version=16.03.08.10; version=16.03.08.11; version=16.03.08.12; version=16.03.08.2; version=16.03.08.3; version=16.03.08.4; version=16.03.08.5; version=16.03.08.6; version=16.03.08.7; version=16.03.08.8; version=16.03.08.9

Published CVSS scores

8.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.4VulDB 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/E:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Overflow
CWE-119Memory Corruption
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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