CVE-2025-28034

Name: CVE-2025-28034
Creator: NVD / NIST
Published: 2025-04-22T14:15:25.263+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2025-28034 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a pre-auth remote command execution vulnerability in the NTPSyncWithHost function through the hostTime parameter.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

Description

TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a pre-auth remote command execution vulnerability in the NTPSyncWithHost function through the hostTime parameter.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.05%

60.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Totolink	A800r Firmware	4.1.2cu.5137_b20200730
Totolink	A810r Firmware	4.1.2cu.5182_b20201026
Totolink	A830r Firmware	4.1.2cu.5182_b20201102
Totolink	A950rg Firmware	4.1.2cu.5161_b20200903
Totolink	A3000ru Firmware	5.9c.5185_b20201128
Totolink	A3100r Firmware	4.1.2cu.5247_b20211129

References

https://locrian-lightning-dc7.notion.site/RCE2-1a98e5e2b1a280bebf53d868f1b1a711?pvs=74Exploit, Third Party Advisory
https://locrian-lightning-dc7.notion.site/CVE-2025-28034-RCE2-1a98e5e2b1a280bebf53d868f1b1a711Exploit, Third Party Advisory

Timeline

Published: Apr 22, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-28034?

How severe is CVE-2025-28034?

CVE-2025-28034 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2025-28034?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-28034?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST