Low Cryptography

CVE-2026-19748 — Tenda CH7 Kylin Web Service CWebSessionManager_ParseSession entropy

A security vulnerability has been detected in Tenda CH7, CH7G, CH10, CP3, CP3 Pro, CP7, TC3B14C, TC3B15C, TC3T14C and TC3T15C up to 20260625. Affected is the function CWebSessionManager_ParseSession of the file /user/bin/Kylin of the component Kylin Web Service. Such manipulation of the argument SESSION leads to insufficient entropy. The attack may be performed from remote. Attacks of this nature are highly complex. The exploitability is told to be difficult.

Published Aug 13, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Tenda

CH10 and 9 more

CVSS base

3.7

Low · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Tenda CH10, Tenda CH7, Tenda CH7G…).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (cryptography), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Tenda	CH10	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	CH7	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	CH7G	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	CP3	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	CP3 Pro	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	CP7	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	TC3B14C	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	TC3B15C	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	TC3T14C	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP
Tenda	TC3T15C	version 20260625	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.3	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.9	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
3.7	CVSS 3.1	Low	2.2	1.4	cna@vuldb.com via NIST National Vulnerability Database
3.7	CVSS 3.1	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
3.7	CVSS 3.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.6	CVSS 2.0	Low	4.9	2.9	cna@vuldb.com via NIST National Vulnerability Database
2.6	CVSS 2.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-330 · Use of Insufficiently Random Values

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Check TLS negotiations and unexpected certificates in the component’s traffic.

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · tenda/ch7, tenda/ch7g, tenda/ch10, tenda/cp3, tenda/cp3 pro, tenda/cp7, tenda/tc3b14c, tenda/tc3b15c, tenda/tc3t14c, ten
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 3.7
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 13, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

6 on the record

vuldb.com/vuln/389499
vdb-entry, technical-description, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-19748
third-party-advisory, NIST National Vulnerability Database
github.com/howitouchyou/Tenda-Smart-Camera-Vulnerability/blob/main/Tenda%20Weak%
related, NIST National Vulnerability Database
vuldb.com/submit/868490
third-party-advisory, NIST National Vulnerability Database
vuldb.com/vuln/389499/cti
signature, permissions-required, NIST National Vulnerability Database
www.tenda.com.cn/
product, NIST National Vulnerability Database

Elsewhere on this site

Tenda
every CVE for this vendor

Cryptography
same class

CWE-330
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-86152 Tenda CP3 Kylin AutoAddWifi.cpp ThreadProc os command injection Sep 5, 2026
Critical CVE-2026-86153 Tenda CP3 Redirect.cpp SetRedirectEnable privileges management Sep 5, 2026
Critical CVE-2026-86151 Tenda CP3 Network Configuration Management system.c sub_2F77E8 os command injection Sep 5, 2026
Medium CVE-2026-86150 Tenda CP3 hostapd hard-coded credentials Sep 5, 2026
Critical CVE-2026-86148 Tenda CP3 Kylin system.c SystemAsh os command injection Sep 5, 2026
Critical CVE-2026-86149 Tenda CP3 NetCheckPing.cpp os command injection Sep 5, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-19748 is "Tenda CH7 Kylin Web Service CWebSessionManager_ParseSession entropy", rated Low. It affects CH10 (Tenda); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 3.7 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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