CVE-2018-25316

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-29. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Tenda W308R v2 V5.07.48 contains a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the goform/AdvSetDns endpoint with a crafted admin language cookie to change DNS servers and redirect user traffic to malicious sites.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

April 29, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Aug 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Tenda W308R v2 V5.07.48 Cookie Session Weakness DNS Change | Advisories | VulnCheck

https://www.vulncheck.com/advisories/tenda-w308r-v2-cookie-session-weakness-dns-change
generic🟡 PoC Available

Tenda W308R v2 Wireless Router 5.07.48 - (Cookie Session) Remote DNS Change - ASP webapps Exploit

https://www.exploit-db.com/exploits/44373

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 91× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 319 total refreshes for this CVE.

  1. 2026-08-28 21:36 UTCEPSS rescore
  2. 2026-08-27 14:21 UTCEPSS rescore
  3. 2026-08-26 14:42 UTCEPSS rescore
  4. 2026-08-25 13:44 UTCEPSS rescore
  5. 2026-08-21 23:45 UTCEPSS rescore
  6. 2026-08-20 22:51 UTCEPSS rescore
  7. 2026-08-19 17:00 UTCEPSS rescore
  8. 2026-08-18 13:44 UTCEPSS rescore
  9. 2026-08-17 13:53 UTCEG score recompute
  10. 2026-08-17 13:53 UTCGHSA enrichment
  11. 2026-08-17 13:43 UTCEPSS rescore
  12. 2026-08-16 14:51 UTCEPSS rescore
  13. 2026-08-16 09:16 UTCGHSA enrichment
  14. 2026-08-16 05:25 UTCEG score recompute
  15. 2026-08-16 05:25 UTCGHSA enrichment
  16. 2026-08-16 02:10 UTCEPSS rescore
  17. 2026-08-15 01:57 UTCEG score recompute
  18. 2026-08-15 01:57 UTCGHSA enrichment
  19. 2026-08-15 01:26 UTCEPSS rescore
  20. 2026-08-14 22:18 UTCGHSA enrichment
  21. 2026-08-14 18:29 UTCGHSA enrichment
  22. 2026-08-14 14:50 UTCGHSA enrichment
  23. 2026-08-14 11:11 UTCGHSA enrichment
  24. 2026-08-14 07:32 UTCGHSA enrichment
  25. 2026-08-14 03:52 UTCEG score recompute
Show 75 more
  1. 2026-08-14 03:52 UTCGHSA enrichment
  2. 2026-08-13 21:56 UTCEPSS rescore
  3. 2026-08-13 08:22 UTCGHSA enrichment
  4. 2026-08-13 04:43 UTCGHSA enrichment
  5. 2026-08-13 01:04 UTCGHSA enrichment
  6. 2026-08-12 21:25 UTCGHSA enrichment
  7. 2026-08-12 17:30 UTCEG score recompute
  8. 2026-08-12 17:30 UTCGHSA enrichment
  9. 2026-08-12 13:46 UTCEPSS rescore
  10. 2026-08-11 23:48 UTCGHSA enrichment
  11. 2026-08-11 20:09 UTCGHSA enrichment
  12. 2026-08-11 16:28 UTCEG score recompute
  13. 2026-08-11 16:27 UTCGHSA enrichment
  14. 2026-08-11 09:12 UTCGHSA enrichment
  15. 2026-08-11 05:32 UTCGHSA enrichment
  16. 2026-08-11 01:53 UTCEG score recompute
  17. 2026-08-11 01:53 UTCGHSA enrichment
  18. 2026-08-10 12:09 UTCGHSA enrichment
  19. 2026-08-10 08:26 UTCGHSA enrichment
  20. 2026-08-10 04:47 UTCGHSA enrichment
  21. 2026-08-10 01:08 UTCGHSA enrichment
  22. 2026-08-09 21:29 UTCGHSA enrichment
  23. 2026-08-09 17:50 UTCGHSA enrichment
  24. 2026-08-09 14:11 UTCEG score recompute
  25. 2026-08-09 14:11 UTCGHSA enrichment
  26. 2026-08-09 13:43 UTCEPSS rescore
  27. 2026-08-09 10:31 UTCGHSA enrichment
  28. 2026-08-09 06:42 UTCGHSA enrichment
  29. 2026-08-09 03:03 UTCEG score recompute
  30. 2026-08-09 03:03 UTCGHSA enrichment
  31. 2026-08-08 16:32 UTCEPSS rescore
  32. 2026-08-08 10:15 UTCGHSA enrichment
  33. 2026-08-08 06:36 UTCGHSA enrichment
  34. 2026-08-08 02:57 UTCGHSA enrichment
  35. 2026-08-07 23:18 UTCGHSA enrichment
  36. 2026-08-07 19:39 UTCEG score recompute
  37. 2026-08-07 19:39 UTCGHSA enrichment
  38. 2026-08-07 16:23 UTCEPSS rescore
  39. 2026-08-07 16:00 UTCGHSA enrichment
  40. 2026-08-07 12:20 UTCGHSA enrichment
  41. 2026-08-07 03:04 UTCGHSA enrichment
  42. 2026-08-06 20:47 UTCGHSA enrichment
  43. 2026-08-06 17:08 UTCEG score recompute
  44. 2026-08-06 17:08 UTCGHSA enrichment
  45. 2026-08-06 13:42 UTCEPSS rescore
  46. 2026-08-06 13:19 UTCGHSA enrichment
  47. 2026-08-06 09:39 UTCGHSA enrichment
  48. 2026-08-06 05:59 UTCGHSA enrichment
  49. 2026-08-06 02:20 UTCGHSA enrichment
  50. 2026-08-05 22:41 UTCEG score recompute
  51. 2026-08-05 22:41 UTCGHSA enrichment
  52. 2026-08-05 19:13 UTCEPSS rescore
  53. 2026-08-04 15:05 UTCEPSS rescore
  54. 2026-08-04 03:52 UTCGHSA enrichment
  55. 2026-08-04 00:11 UTCGHSA enrichment
  56. 2026-08-03 20:31 UTCEG score recompute
  57. 2026-08-03 20:31 UTCGHSA enrichment
  58. 2026-08-03 00:40 UTCGHSA enrichment
  59. 2026-08-02 20:52 UTCGHSA enrichment
  60. 2026-08-02 17:13 UTCGHSA enrichment
  61. 2026-08-02 13:34 UTCGHSA enrichment
  62. 2026-08-02 09:54 UTCGHSA enrichment
  63. 2026-08-02 05:52 UTCEG score recompute
  64. 2026-08-02 05:52 UTCGHSA enrichment
  65. 2026-08-02 02:23 UTCEPSS rescore
  66. 2026-08-01 04:12 UTCEPSS rescore
  67. 2026-07-30 16:24 UTCEPSS rescore
  68. 2026-07-30 01:27 UTCEPSS rescore
  69. 2026-07-28 15:32 UTCEPSS rescore
  70. 2026-07-26 14:51 UTCEPSS rescore
  71. 2026-07-26 14:51 UTCEPSS rescore
  72. 2026-07-25 14:14 UTCEPSS rescore
  73. 2026-07-24 14:14 UTCEPSS rescore
  74. 2026-07-24 14:14 UTCEPSS rescore
  75. 2026-07-23 14:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2018-25316?
CVE-2018-25316 is a critical vulnerability published on April 29, 2026. Tenda W308R v2 V5.07.48 contains a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the goform/AdvSetDns endpoint with a crafted admin language cookie to change DNS…
When was CVE-2018-25316 disclosed?
CVE-2018-25316 was first published in the National Vulnerability Database on April 29, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-25316 actively exploited?
CVE-2018-25316 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.7% of all scored CVEs.
What is the CVSS score of CVE-2018-25316?
CVE-2018-25316 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2018-25316?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-25316, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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