CVE-2026-4253

highpriority · track · 42EPSS 0.072 · 94 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

7.24% (94th) EPSS

CVSS 7.2 · high

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2–7.2

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 5.9

v2.05.8mediumAV:N/AC:L/Au:M/C:P/I:P/A:Psecondary · cna@vuldb.comexploitability 6.4 · impact 6.4

v3.14.7mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:Lsecondary · cna@vuldb.comexploitability 1.2 · impact 3.4

v4.05.1mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:Psecondary · ENISA EU

v4.02lowCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · cna@vuldb.com

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USprimaryCWE-77US

exploits (1)

Public proof-of-concept and weaponised exploit code.

renzi25031469/CVE-2026-4253-ScannerNon-destructive vulnerability scanner for NGINX HTTP/3 (ngx_http_v3_module). It ONLY performs a safe probe: opens an HTTP/3 (QUIC) connection, sends a single HEAD request and inspects the `Server` response header. It NEVER attempts to reopen a QPACK encoder stream or trigger the use-after-free.PoC · poc_in_github

affected products (2)

Products and version ranges known to be affected.

Tenda AC8≤ 16.03.50.11enisa_euvdEU
tenda ac8 firmware= 16.03.50.11nvdUScpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2026-03-16modified 2026-06-17

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references (15)

External citations — patches, advisories, analysis.

scry

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