What is CVE-2020-5797?

CVE-2020-5797 is a medium-severity vulnerability in TP-Link Archer C9, classified under Improper Link Resolution Before File Access. CVSS score: 6.1/10. Published 2020-11-21.

How severe is CVE-2020-5797?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in TP-Link Archer C9

CVE-2020-5797

UNIX Symbolic Link (Symlink) Following in TP-Link Archer C9(US)_V1_180125 firmware allows an unauthenticated actor, with physical access and network access, to read sensitive files and write to a limited set of files after plugging a crafted USB drive into the router.

Published 2020-11-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

TP-Link Archer C9 — versions v1
TP-Link Archer C9 Firmware — versions 180125
TP-Link Archer C9 A1 — versions Archer C9(US)_V1_180125 firmware

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

www.tenable.com/security/research/tra-2020-60 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-5797?: CVE-2020-5797 is a medium-severity vulnerability in TP-Link Archer C9, classified under Improper Link Resolution Before File Access. CVSS score: 6.1/10. Published 2020-11-21.
How severe is CVE-2020-5797?: Medium severity. CVSS v3 base score is 6.1 out of 10.