Vulnerability · Published Jan 21, 2022 · Assigned by zdi

CVE-2021-35003

Critical 9.8

In plain English

A critical-severity stack buffer overflow in Archer C90 from TP-Link. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.7% (higher than 95% of all known vulnerabilities).

Severity (CVSS 3.0)9.8Critical

Exploit odds (30 days)7.7%top 5.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer C90 1.0.6 Build 20200114 rel.73164(5553) routers. Authentication is not required to exploit this vulnerability. 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 vulnerability to execute code in the context of root. Was ZDI-CAN-14655.

Affected products (as reported)

Vendor	Product	Versions
TP-Link	Archer C90	1.0.6 Build 20200114 rel.73164(5553)

Weakness: CWE-121 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://www.zerodayinitiative.com/advisories/ZDI-22-080/ x_refsource_MISC