What is CVE-2020-28877?

CVE-2020-28877 is a critical-severity vulnerability in TP-Link Wdr7400, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-11-20.

How severe is CVE-2020-28877?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2020-28877 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in TP-Link Wdr7400

CVE-2020-28877

Buffer overflow in in the copy_msg_element function for the devDiscoverHandle server in the TP-Link WR and WDR series, including WDR7400, WDR7500, WDR7660, WDR7800, WDR8400, WDR8500, WDR8600, WDR8620, WDR8640, WDR8660, WR880N, WR886N, WR890N, WR890N, WR882N, and WR708N.

Vulnerability class: Buffer Overflow

EPSS: 0.012 (64.6th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Broken Link)
nvd@nist.gov (Third Party Advisory)

Frequently asked questions

What is CVE-2020-28877?: CVE-2020-28877 is a critical-severity vulnerability in TP-Link Wdr7400, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-11-20.
How severe is CVE-2020-28877?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-28877 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.