How severe is CVE-2025-13399?

CVE-2025-13399 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-13399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-13399?

CVE-2025-13399 affects Tp-link Vx800v Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-13399?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-13399 have an EU (EUVD) identifier?

Yes. CVE-2025-13399 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206515.

When was CVE-2025-13399 published?

CVE-2025-13399 was published on 2026-01-29 and last updated on 2026-06-17.

CVE-2025-13399

CVE-2025-13399 is a high-severity vulnerability in Tp-link Vx800v Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 7.7
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206515
Weakness: CWE-331
Affected product: Tp-link Vx800v Firmware
Published: 2026-01-29
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-13399?: 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.
How severe is CVE-2025-13399?: CVE-2025-13399 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-13399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-13399?: CVE-2025-13399 affects Tp-link Vx800v Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-13399?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-13399 have an EU (EUVD) identifier?: Yes. CVE-2025-13399 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206515.
When was CVE-2025-13399 published?: CVE-2025-13399 was published on 2026-01-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tp-link:vx800v_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Tp-link Vx800v Firmware

CVE-2025-15548 — Medium (CVSS 6.5): Some VX800v v1.0 web interface endpoints transmit sensitive information over unencrypted HTTP due to missing…
CVE-2025-15541 — Medium (CVSS 6.3): Improper link resolution in the VX800v v1.0 SFTP service allows authenticated adjacent attackers to use crafted…
CVE-2025-15542 — Medium (CVSS 5.3): Improper handling of exceptional conditions in VX800v v1.0 in SIP processing allows an attacker to flood the device…
CVE-2025-15543 — Medium (CVSS 4.6): Improper link resolution in USB HTTP access path in VX800v v1.0 allows a crafted USB device to expose root filesystem…

All CVEs affecting Tp-link Vx800v Firmware →

Other CWE-331 vulnerabilities

CVE-2020-36925 — Critical (CVSS 9.8): Arteco Web Client DVR/NVR contains a session hijacking vulnerability with insufficient session ID complexity that…
CVE-2025-47781 — Critical (CVSS 9.8): Rallly is an open-source scheduling and collaboration tool. Versions up to and including 3.22.1 of the application…
CVE-2024-47945 — Critical (CVSS 9.8): The devices are vulnerable to session hijacking due to insufficient entropy in its session ID generation algorithm.…
CVE-2024-25730 — Critical (CVSS 9.8): Hitron CODA-4582 and CODA-4589 devices have default PSKs that are generated from 5-digit hex values concatenated with a…
CVE-2023-49599 — Critical (CVSS 9.8): An insufficient entropy vulnerability exists in the salt generation functionality of WWBN AVideo dev master commit…
CVE-2022-34294 — Critical (CVSS 9.8): totd 1.5.3 uses a fixed UDP source port in upstream queries sent to DNS resolvers. This allows DNS cache poisoning…

Browse all CWE-331 vulnerabilities →