Security readout for executives and security teams
Plain-English summary
CVE-2020-10888 is an authentication bypass in TP-Link Archer A7 AC1750 routers running Firmware Ver: 190726. A remote unauthenticated attacker may be able to create SSH port-forwarding rules during initial setup, reaching resources normally protected from the WAN side.
Executive priority
Prioritize remediation for affected routers at network edges. The severity is moderate, but perimeter authentication bypasses can undermine segmentation and expose internal resources if the specific vulnerable firmware is still deployed.
Technical view
The flaw is CWE-287 improper authentication in handling SSH port forwarding requests during initial setup. The CVSS 3.0 score is 5.9, driven by network reachability, no privileges, high attack complexity, and high integrity impact. Sources identify TP-Link Archer A7 Firmware Ver: 190726 only.
Likely exposure
Exposure is likely limited to organizations still operating TP-Link Archer A7 devices on Firmware Ver: 190726, especially where WAN-side setup or management paths can be reached. The source bundle does not identify other models or versions.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. ZDI describes remote unauthenticated exploitation as possible, but with high attack complexity. Treat as a perimeter device risk where affected firmware remains deployed.
Researcher notes
Evidence is narrow: TP-Link Archer A7 Firmware Ver: 190726, ZDI-CAN-9664, CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N. No KEV listing, exploit-in-the-wild claim, patched version, or workaround is provided in the bundle.
Mitigation direction
- Inventory Archer A7 routers and identify firmware Ver: 190726.
- Check TP-Link and ZDI guidance for fixed firmware or official workarounds.
- Restrict WAN access to router management and setup surfaces where possible.
- Monitor router configuration for unexpected port-forwarding rules.
- Replace or isolate unsupported devices that cannot be remediated.
Validation and detection
- Confirm model and firmware from asset inventory or device administration records.
- Verify whether any affected routers are reachable from WAN-facing networks.
- Review router configuration for unauthorized SSH port-forwarding changes.
- Check change logs for unexpected setup or forwarding modifications.
- Document remediation status against the ZDI advisory and vendor guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-10888 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
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.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.zerodayinitiative.com/advisories/ZDI-20-340/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.