CVE-2021-35402

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-02-20. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: Elevated riskExposed: 0

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

PROLiNK PRC2402M 20190909 before 2021-06-13 allows live_api.cgi?page=satellite_list OS command injection via shell metacharacters in the ip parameter (for satellite_status).

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
76(Attend)
EG Risk 76/100SSVC: 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
Severity100% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
60%
KEV
Not listed

Published

February 20, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Sep 19, 2026
No patch confirmed yet.
generic

(CVE-20221-35402) Prolink PRC2402M live_api.cgi satellist_list Un-authenticated Command Injection Vulnerability | STAR Labs

https://starlabs.sg/advisories/21/21-35402/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 33× 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 252 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-35402?
CVE-2021-35402 is a critical vulnerability published on February 20, 2026. PROLiNK PRC2402M 20190909 before 2021-06-13 allows liveapi.cgi?page=satellitelist OS command injection via shell metacharacters in the ip parameter (for satellite_status).
When was CVE-2021-35402 disclosed?
CVE-2021-35402 was first published in the National Vulnerability Database on February 20, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-35402 actively exploited?
CVE-2021-35402 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 39.5% of all scored CVEs.
What is the CVSS score of CVE-2021-35402?
CVE-2021-35402 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2021-35402?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-35402, 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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