PT-2020-12393 · Tp Link · Tp-Link Archer A7

Pedro Ribeiro + 1 · Published 2020-03-25 · Updated 2025-05-22 · CVE-2020-10881

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions TP-Link Archer A7 Firmware version 190726 AC1750

Description This issue allows remote attackers to execute arbitrary code on affected installations. Authentication is not required to exploit this issue. The specific flaw exists within the handling of DNS responses. A crafted DNS message can trigger an overflow of a fixed-length, stack-based buffer. An attacker can leverage this issue to execute code in the context of the root user.

Recommendations For TP-Link Archer A7 Firmware version 190726 AC1750, consider restricting access to the DNS handling functionality until a patch is available. As a temporary workaround, avoid using the affected router's DNS response handling feature until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Memory Corruption

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

CVE-2020-10881

ZDI-20-333

Affected Products

Tp-Link Archer A7

References · 4

• https://osv.dev/vulnerability/CVE-2020-10881 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10881 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-20-333 · Security Note
• https://twitter.com/cyber_advising/status/1925365335651205209 · Twitter Post