Security readout for executives and security teams
Plain-English summary
This issue lets an unauthenticated attacker change DNS settings on a Tenda W308R v2 router running firmware V5.07.48. If successful, users behind the router could be silently redirected to attacker-controlled destinations, enabling credential theft, traffic interception, or outage. The bundle does not identify a vendor patch.
Executive priority
Treat as urgent for any confirmed W308R v2 V5.07.48 device. DNS control can redirect business traffic and users without endpoint compromise. Prioritize isolation, configuration review, and vendor remediation confirmation.
Technical view
CVE-2018-25316 is a CWE-290 authentication/session validation weakness in Tenda W308R v2 V5.07.48. The described impact is unauthorized DNS configuration change through insufficient session validation around the router DNS configuration function. CVSS 3.1 is 9.8 with network, low-complexity, unauthenticated exploitation characteristics.
Likely exposure
Exposure is limited to Tenda W308R v2 devices on firmware V5.07.48, especially where the router management interface is reachable from untrusted networks. The source bundle does not prove other Tenda models, versions, or firmware branches are affected.
Exploitation context
A public ExploitDB reference is listed, indicating public exploit information exists. The bundle marks CISA KEV status as false and provides no cited evidence of active exploitation in the wild.
Researcher notes
The record is source-thin: affected scope is specific, duplicate affected entries appear in the bundle, and no patch is named. Do not generalize beyond W308R v2 V5.07.48 without vendor or firmware evidence.
Mitigation direction
- Check Tenda guidance for fixed firmware or replacement direction.
- Remove management access from the public internet immediately.
- Restrict router administration to trusted internal networks only.
- Verify DNS settings and reset unauthorized resolver changes.
- Replace affected devices if no vendor-supported fix exists.
Validation and detection
- Inventory Tenda W308R v2 routers and confirm firmware version.
- Check whether administrative interfaces are reachable from untrusted networks.
- Review configured DNS resolvers for unauthorized changes.
- Monitor DNS traffic for unexpected resolver destinations.
- Track vendor and CVE records for patch or advisory updates.
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-290: 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-2018-25316 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
2 official scoresWe 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
- ExploitDB-44373CVE reference, VulnCheck · exploit
- VulnCheck Advisory: Tenda W308R v2 V5.07.48 Cookie Session Weakness DNS ChangeCVE reference, VulnCheck · third-party-advisory
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.
Authentication Bypass by Spoofing
Authentication Bypass by Spoofing represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.