Security readout for executives and security teams
Plain-English summary
This is a memory corruption flaw reported in Tenda AC8v4 firmware V16.03.34.09. An attacker on an adjacent network may be able to affect confidentiality, integrity, and availability at a limited level. The provided sources do not confirm active exploitation or a vendor-fixed version.
Executive priority
Handle as a targeted network-appliance risk, not an internet-wide emergency based on the provided evidence. Prioritize affected routers in shared, guest, branch, or unmanaged Wi-Fi environments.
Technical view
The CVE describes a CWE-787 out-of-bounds write related to sscanf handling in set_client_qos, where part of s8 is overwritten with a null byte. The report states this can lead to control over the gp register. CVSS 3.1 is 6.3 with adjacent-network attack vector and no privileges required.
Likely exposure
Exposure appears limited to environments running Tenda AC8v4 firmware V16.03.34.09 where an adjacent network attacker can reach the vulnerable functionality. The CVE affected-product metadata is incomplete, so inventory confirmation is essential.
Exploitation context
The bundle includes a public GitHub reference, but it does not establish active exploitation. The CVE is not listed as KEV in the provided data. Treat exploitability as plausible but not confirmed in-the-wild.
Researcher notes
The CVE record lacks structured affected CPEs and does not name a fixed release. Analysis should stay anchored to AC8v4 V16.03.34.09 and avoid extrapolating to other Tenda models without vendor confirmation.
Mitigation direction
- Inventory Tenda AC8v4 devices and identify firmware version V16.03.34.09.
- Check Tenda guidance and downloads for firmware updates or replacement advice.
- Restrict untrusted adjacent-network access to router management and device-control surfaces.
- Segment guest, IoT, and unmanaged networks away from affected devices.
- Monitor router logs and configuration changes for unexpected QoS-related activity.
Validation and detection
- Confirm device model and firmware version from router administration or asset records.
- Verify whether vulnerable devices are reachable from guest, Wi-Fi, or adjacent network segments.
- Review Tenda download guidance for newer firmware applicable to AC8v4.
- Check whether QoS/client-control functionality is exposed to untrusted local users.
- Document compensating controls where no vendor fix is confirmed.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-48194 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L2.83.4CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/zt20xx/CVE-2023-48194CVE reference, mitre
- https://www.tenda.com.cn/download/detail-3683.htmlCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.