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CVE Record

CVE-2021-31659: TP-Link TL-SG2005, TL-SG2008, etc.

TP-Link TL-SG2005, TL-SG2008, etc. 1.0.0 Build 20180529 Rel.40524 is vulnerable to Cross Site Request Forgery (CSRF). All configuration information is placed in the URL, without any additional token authentication information. A malicious link opened by the switch administrator may cause the password of the switch to be modified and the configuration file to be tampered with.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-31659 is a CSRF flaw in TP-Link switch web administration. If a logged-in switch administrator opens a malicious link, switch settings could be changed, including password or configuration changes. The public record names TP-Link TL-SG2005 and TL-SG2008, but affected scope and fix details are incomplete.

Executive priority

Treat as a targeted administration-risk issue, not a confirmed mass-exploitation event. Prioritize if these switches manage important network segments or have broadly reachable web management. The main business risk is unauthorized network configuration change through administrator session abuse.

Technical view

The issue is described as missing CSRF token protection, with configuration parameters placed in URLs. This can allow state-changing administrative actions through a crafted link viewed by an authenticated administrator. The cited version is 1.0.0 Build 20180529 Rel.40524. No CVSS score, CWE, or vendor remediation is provided in the source bundle.

Likely exposure

Exposure is most relevant where the affected switch web interface is used by administrators. Risk increases if management access is reachable from user networks or the internet. Public sources do not confirm broad affected models beyond the named TP-Link devices and ambiguous “etc.” wording.

Exploitation context

The record describes social-engineering-dependent exploitation: an authenticated administrator must open a malicious link while logged into the switch. CISA KEV is false in the provided data, and no cited source states active exploitation.

Researcher notes

Evidence is limited to the CVE description and a GitHub reference. The affected product list in structured data is not normalized, and “etc.” is not enough to confirm additional models. No official patch, CVSS vector, or exploitation-in-the-wild evidence is included.

Mitigation direction

  • Check TP-Link advisories or support for firmware guidance for the exact model and build.
  • Restrict switch management interfaces to trusted admin networks only.
  • Require administrators to avoid browsing untrusted sites while logged into switch management.
  • Use strong, unique switch administrator credentials and rotate if exposure is suspected.
  • Monitor switch configuration changes for unauthorized modifications.

Validation and detection

  • Inventory TP-Link TL-SG2005 and TL-SG2008 switches and record firmware builds.
  • Confirm whether any device runs 1.0.0 Build 20180529 Rel.40524.
  • Review whether management interfaces are reachable outside trusted admin segments.
  • Check logs or backups for unexpected password or configuration changes.
  • Verify vendor documentation for model-specific updates or compensating controls.
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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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-31659 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
3Timeline events
1ADP providers
2Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

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.