8.8

CVE-2025-13399: tp-link systems inc. vx800v v1.0 Insufficient Entropy

CVSS: 8.8v3.1HighAnalyzed
Published 29-01-2026Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-13399 is a high (CVSS 8.8) Insufficient Entropy vulnerability in tp-link systems inc. vx800v v1.0. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.8% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 29-01-2026
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

A weakness in the web interface’s application layer encryption in VX800v v1.0 allows an adjacent attacker to brute force the weak AES key and decrypt intercepted traffic. Successful exploitation requires network proximity but no authentication, and may result in high impact to confidentiality, integrity, and availability of transmitted data.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.01 pp

From 0.16% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Tp-link1 product
Tp-link systems inc.1 product
  • vx800v v1.0< 800.0.11 (0.11.0 3.0.0 v603c.0 Build 250702)

2 vendors · 2 products

References

2 links