Buffer overflow in TP-Link Archer C90
CVE-2021-35003
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.077 (94.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.077 · newest: 0.077 · change: 0.000
Affected products
- TP-Link Archer C90 — versions 1.0.6 Build 20200114 rel.73164(5553)
- TP-Link Archer C90
- TP-Link Archer C90 Firmware — versions 1.0.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zerodayinitiative.com/advisories/ZDI-22-080/ (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-35003?
- CVE-2021-35003 is a critical-severity vulnerability in TP-Link Archer C90, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2022-01-21.
- How severe is CVE-2021-35003?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-35003 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.