CVE-2025-13399

Adjacent traffic decryption via weak AES key

Published Jan 29, 2026 · Updated Jan 29, 2026

Weak web-interface encryption in TP-Link VX800v v1.0 firmware before 800.0.11 allows adjacent attackers to decrypt intercepted traffic. The web interface encrypts traffic with an AES key weak enough to brute-force, allowing captured ciphertext to be recovered without authentication. Exploitation requires network proximity and traffic interception, with consequences confined to transmitted data.

CVSS severity7.7
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Weak web-interface encryption in TP-Link VX800v v1.0 firmware before 800.0.11 allows adjacent attackers to decrypt intercepted traffic. The web interface encrypts traffic with an AES key weak enough to brute-force, allowing captured ciphertext to be recovered without authentication. Exploitation requires network proximity and traffic interception, with consequences confined to transmitted data.

The record

CVE
CVE-2025-13399
Published
Jan 29, 2026
Updated
Jan 29, 2026
Vendor
TP-Link Systems Inc.
Product
VX800v
Classifications
CWE-331, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <800.0.11 (0.11.0 3.0.0 v603c.0 Build 250702)

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · VX800vversion=0 <800.0.11 (0.11.0 3.0.0 v603c.0 Build 250702)

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.7TPLinkCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo