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CVE Record

CVE-2018-14557: An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with f...

An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A buffer overflow vulnerability exists in the router's web server (httpd). When processing the page parameters for a post request, the value is directly written with sprintf to a local variable placed on the stack, which overrides the return address of the function, a causing buffer overflow.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This CVE affects certain Tenda AC7, AC9, and AC10 router firmware. The router web server can mishandle POST page parameters, causing a stack buffer overflow. For executives, the main concern is exposed or unmanaged router administration interfaces, especially on legacy firmware with unclear vendor remediation evidence in the provided sources.

Executive priority

Prioritize discovery and exposure reduction for affected routers, especially at branch offices, small sites, and unmanaged edge networks. Business urgency is high if administration is internet-facing; otherwise handle through a focused legacy-device remediation plan.

Technical view

The source description says httpd writes POST page parameter values into a stack local variable using sprintf, allowing overwrite of the function return address. Affected firmware is listed through AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, and AC10 V15.03.06.23_CN. CVSS, CWE, and official patch details are not provided.

Likely exposure

Exposure is most likely where affected Tenda AC7, AC9, or AC10 routers are deployed and their web administration service is reachable by untrusted users. Internet-facing management interfaces materially increase concern. The provided bundle does not identify affected CPEs or broader product families.

Exploitation context

The provided bundle does not show CISA KEV listing or confirmed active exploitation. It includes a public GitHub reference, but the bundle does not establish exploit maturity, observed attacks, or vendor-confirmed remediation. Treat exploitation status as unconfirmed.

Researcher notes

Evidence is limited to the CVE description and one public GitHub reference. The technical root cause is stack overflow via unsafe sprintf handling in httpd, but source data lacks CVSS, CWE mapping, patch status, and verified exploit observations.

Mitigation direction

  • Identify affected Tenda AC7, AC9, and AC10 routers and firmware versions.
  • Check Tenda guidance for fixed firmware or replacement recommendations.
  • Remove router web administration from internet exposure.
  • Limit management access to trusted networks or VPN only.
  • Retire devices if no supported fixed firmware is available.

Validation and detection

  • Inventory router model and firmware through asset records or admin interfaces.
  • Confirm whether web management is reachable from untrusted networks.
  • Compare firmware against the affected versions named in the CVE description.
  • Review vendor advisories before assuming a patch exists.
  • Document compensating controls for any device that cannot be updated.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2018-14557 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.