CVE-2026-0834

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 34.8% of scored records. A rank, not a probability.

NVD base score

7.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-01-21 17:14Z7 MO AGO

Last updated

2026-04-28 17:46Z4 MO AGO

Reserved

2026-01-09

Assigning CNA

TPLink

Record state

PUBLISHED

Severity

High (CVSS 7.2)

CNA CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-290Authentication Bypass by SpoofingBase

Data version

5.2

Document digest

28002588188848b736bfd4fdec468397a91ffb980348688d79d5f0eb65478963

• www.tp-link.comhttps://www.tp-link.com/en/support/download/archer-c20/v6/#Firmwarepatch
• www.tp-link.comhttps://www.tp-link.com/en/support/download/archer-ax53/v1/#Firmwarepatch
• mattg.systemshttps://mattg.systems/posts/cve-2026-0834/
• www.tp-link.comhttps://www.tp-link.com/us/support/faq/4905/vendor-advisory
• www.tp-link.comhttps://www.tp-link.com/us/support/download/archer-c20/v5/#Firmwarepatch
• www.tp-link.comhttps://www.tp-link.com/en/support/download/archer-c20/v5/#Firmwarepatch
• www.tp-link.comhttps://www.tp-link.com/us/support/download/tl-wr841n/v13/#Firmwarepatch