Security readout for executives and security teams
Plain-English summary
CVE-2020-10887 is a firewall bypass in TP-Link Archer A7 Firmware Ver: 190726 AC1750 routers. An unauthenticated network attacker may bypass filtering for IPv6 SSH traffic. The source says this can support root-level code execution when combined with other vulnerabilities, making exposed affected routers a high-priority risk.
Executive priority
Treat this as high priority for any affected router exposed to untrusted networks. The business risk is perimeter control failure with potential root compromise when chained with other flaws. Focus first on confirming whether the exact affected firmware is present.
Technical view
The flaw is improper protection under CWE-693 in IPv6 connection handling. Affected Archer A7 firmware lacks proper filtering of IPv6 SSH connections. CVSS 3.0 is 8.1 with network attack vector, no privileges, no user interaction, high impact, and high attack complexity.
Likely exposure
Exposure is limited to TP-Link Archer A7 AC1750 routers running Firmware Ver: 190726, especially where IPv6 connectivity and SSH reachability exist across untrusted networks. The bundle does not identify other affected models or firmware versions.
Exploitation context
The source states authentication is not required, but attack complexity is high. It also states the issue can be used with other vulnerabilities to execute code as root. The bundle does not show CISA KEV listing or confirmed active exploitation.
Researcher notes
Evidence is specific to Archer A7 Firmware Ver: 190726. The public bundle identifies ZDI-CAN-9663 and CWE-693, but does not provide a vendor patch name, exploit details, or broader version range. Avoid assuming active exploitation without KEV or another cited source.
Mitigation direction
- Inventory Archer A7 routers and identify devices running Firmware Ver: 190726.
- Check TP-Link and ZDI guidance for fixed firmware or official workarounds.
- Apply only vendor-supported firmware updates confirmed for the affected model.
- Reduce untrusted network exposure for affected devices pending vendor guidance.
- Prioritize replacement if supported remediation is unavailable or cannot be validated.
Validation and detection
- Confirm model, hardware, and firmware version for all TP-Link Archer A7 routers.
- Review whether IPv6 connectivity is enabled on affected devices.
- Verify whether SSH is reachable from untrusted network paths under approved defensive testing.
- Check asset records for compensating controls around perimeter router management exposure.
- Document remediation status and evidence for each affected device.
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-693: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2020-10887 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
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.zerodayinitiative.com/advisories/ZDI-20-338/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.
Protection Mechanism Failure
Protection Mechanism Failure represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.