Is CVE-2026-4253 actively exploited?

No active exploitation of CVE-2026-4253 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4253 be exploited remotely?

Yes. CVE-2026-4253 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4253?

CVE-2026-4253 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2026-4253

HIGH

CVE-2026-4253

CWE-77Published: March 16, 2026· Updated: Mar 20, 2026

7.2

CVSS v3.1

EPSS:0.56%probability of exploitation in 30 daysPercentile:68.0th

Official Description

A security flaw has been discovered in Tenda AC8 16.03.50.11. This affects the function route_set_user_policy_rule of the file /cgi-bin/UploadCfg of the component Web Interface. The manipulation of the argument wans.policy.list1 results in os command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.

NVD Source

Technical Analysis

CVE-2026-4253 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.High

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

tenda2 products

ac8 firmwareac8

Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://vuldb.com/?id.351211

ADVISORYhttps://vuldb.com/?submit.771771

News & Research Mentioning CVE-2026-4253

F5 Patches Two Critical NGINX Open Source Flaws Enabling Remote Code Execution

The Hacker News· Jun 18, 2026

F5 has released security updates to address two critical security flaws in NGINX Open Source that could be exploited to achieve code execution on affected systems. The vulnerabilities are listed below - CVE-2026-42530 (CVSS v4 score: 9.2) - A use-after-free vulnerability in the ngx_http_v3_module that could be triggered by a remote unauthenticated attacker when NGINX Open Source is [xlite_meta score:50 src:The Hacker News xlite_fp:4a308d756777d07753fdd27f3e8df4cb9d61b5765511af55b16a7fbd751fc87a]