CVE-2010-20112

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 1.1%, top 37% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.3Exploit: NoneExposed: 0

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

Amlib’s NetOpacs webquery.dll contains a stack-based buffer overflow vulnerability triggered by improper handling of HTTP GET parameters. Specifically, the application fails to enforce bounds on input supplied to the app parameter, allowing excessive data to overwrite memory structures including the Structured Exception Handler (SEH). Additionally, malformed parameter names followed by an equals sign may result in unintended control flow behavior. This vulnerability is exposed through IIS and affects legacy Windows deployments

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
62.8%
KEV
Not listed

Published

August 21, 2025

Last Modified

April 15, 2026

Advisory Details (5)

Auto-updated Jun 10, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Amlibweb NetOpacs - 'webquery.dll' Remote Stack Buffer Overflow (Metasploit) - Windows remote Exploit

https://www.exploit-db.com/exploits/16793
generic
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/amlibweb_webquerydll_app.rb
generic

Amlibweb NetOpacs webquery.dll Stack Buffer Overflow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/amlibweb-netopacs-stack-buffer-overflow
generic

Just a moment

https://www.fortiguard.com/encyclopedia/ips/24002
generic

CPAI-2013-1344 - Check Point Software

https://advisories.checkpoint.com/defense/advisories/public/2013/cpai-2013-1344.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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.

  1. 2026-07-22 21:45 UTCEG score recompute
  2. 2026-07-22 14:03 UTCEPSS rescore
  3. 2026-07-22 14:03 UTCEPSS rescore
  4. 2026-07-21 15:20 UTCEPSS rescore
  5. 2026-07-20 17:03 UTCEPSS rescore
  6. 2026-07-19 02:25 UTCEPSS rescore
  7. 2026-07-18 10:00 UTCEPSS rescore
  8. 2026-07-16 16:58 UTCEPSS rescore
  9. 2026-07-15 16:54 UTCEPSS rescore
  10. 2026-07-15 16:54 UTCEPSS rescore
  11. 2026-07-15 01:55 UTCEPSS rescore
  12. 2026-07-13 22:25 UTCEPSS rescore
  13. 2026-07-13 06:08 UTCEPSS rescore
  14. 2026-07-11 08:22 UTCEPSS rescore
  15. 2026-07-08 15:10 UTCEPSS rescore
  16. 2026-07-08 15:10 UTCEPSS rescore
  17. 2026-07-06 02:19 UTCEPSS rescore
  18. 2026-07-06 02:19 UTCEPSS rescore
  19. 2026-07-05 02:26 UTCEPSS rescore
  20. 2026-07-02 14:01 UTCEPSS rescore
  21. 2026-07-01 15:02 UTCEPSS rescore
  22. 2026-06-30 23:19 UTCEPSS rescore
  23. 2026-06-28 14:03 UTCEPSS rescore
  24. 2026-06-28 04:52 UTCEPSS rescore
  25. 2026-06-28 04:52 UTCEPSS rescore
Show 65 more
  1. 2026-06-27 03:05 UTCEPSS rescore
  2. 2026-06-25 13:46 UTCEPSS rescore
  3. 2026-06-24 14:02 UTCEPSS rescore
  4. 2026-06-24 14:02 UTCEPSS rescore
  5. 2026-06-23 21:30 UTCEPSS rescore
  6. 2026-06-23 21:29 UTCEPSS rescore
  7. 2026-06-22 14:22 UTCEPSS rescore
  8. 2026-06-22 14:22 UTCEPSS rescore
  9. 2026-06-21 14:53 UTCEPSS rescore
  10. 2026-06-21 01:56 UTCEPSS rescore
  11. 2026-06-21 01:56 UTCEPSS rescore
  12. 2026-06-19 19:22 UTCEPSS rescore
  13. 2026-06-19 19:22 UTCEPSS rescore
  14. 2026-06-18 17:49 UTCEPSS rescore
  15. 2026-06-18 17:49 UTCEPSS rescore
  16. 2026-06-17 17:49 UTCEPSS rescore
  17. 2026-06-17 17:49 UTCEPSS rescore
  18. 2026-06-16 17:49 UTCEPSS rescore
  19. 2026-06-15 17:44 UTCEPSS rescore
  20. 2026-06-14 23:14 UTCEPSS rescore
  21. 2026-06-13 22:57 UTCEPSS rescore
  22. 2026-06-13 22:57 UTCEPSS rescore
  23. 2026-06-13 22:57 UTCEPSS rescore
  24. 2026-06-12 23:08 UTCEPSS rescore
  25. 2026-06-12 23:08 UTCEPSS rescore
  26. 2026-06-11 13:56 UTCEPSS rescore
  27. 2026-06-10 22:14 UTCEPSS rescore
  28. 2026-06-10 13:17 UTCEPSS rescore
  29. 2026-06-08 15:39 UTCEG score recompute▲ 9.30
  30. 2026-06-08 15:39 UTCGHSA enrichment
  31. 2026-06-08 14:13 UTCEPSS rescore
  32. 2026-06-07 15:22 UTCEPSS rescore
  33. 2026-06-07 15:22 UTCEPSS rescore
  34. 2026-06-06 13:44 UTCEPSS rescore
  35. 2026-06-06 13:44 UTCEPSS rescore
  36. 2026-06-05 22:44 UTCEPSS rescore
  37. 2026-06-05 22:44 UTCEPSS rescore
  38. 2026-06-04 13:09 UTCEPSS rescore
  39. 2026-06-04 13:09 UTCEPSS rescore
  40. 2026-06-02 20:10 UTCEPSS rescore
  41. 2026-06-02 20:10 UTCEPSS rescore
  42. 2026-06-01 13:49 UTCEPSS rescore
  43. 2026-06-01 13:49 UTCEPSS rescore
  44. 2026-05-31 22:28 UTCEPSS rescore
  45. 2026-05-31 22:28 UTCEPSS rescore
  46. 2026-05-31 00:14 UTCEPSS rescore
  47. 2026-05-31 00:13 UTCEPSS rescore
  48. 2026-05-29 13:40 UTCEPSS rescore
  49. 2026-05-28 13:42 UTCEPSS rescore
  50. 2026-05-28 13:42 UTCEPSS rescore
  51. 2026-05-26 07:16 UTCEPSS rescore
  52. 2026-05-26 07:16 UTCEPSS rescore
  53. 2026-05-22 21:15 UTCEPSS rescore
  54. 2026-05-22 21:15 UTCEPSS rescore
  55. 2026-05-22 21:15 UTCEPSS rescore
  56. 2026-05-21 22:39 UTCEPSS rescore
  57. 2026-05-21 09:23 UTCEG score recompute
  58. 2026-05-21 09:23 UTCGHSA enrichment
  59. 2026-05-20 22:37 UTCEPSS rescore
  60. 2026-05-20 22:37 UTCEPSS rescore
  61. 2026-05-20 22:37 UTCEPSS rescore
  62. 2026-05-20 11:21 UTCEPSS rescore
  63. 2026-05-20 11:21 UTCEPSS rescore
  64. 2026-05-18 21:29 UTCEPSS rescore
  65. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/windows/http/amlibweb_webquerydll_app✓ verified
    First seen Aug 3, 2010

    Amlibweb NetOpacs webquery.dll Stack Buffer Overflow

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2010-20112?
CVE-2010-20112 is a critical vulnerability published on August 21, 2025. Amlib’s NetOpacs webquery.dll contains a stack-based buffer overflow vulnerability triggered by improper handling of HTTP GET parameters. Specifically, the application fails to enforce bounds on input supplied to the app parameter, allowing excessive data to overwrite memory structures including…
When was CVE-2010-20112 disclosed?
CVE-2010-20112 was first published in the National Vulnerability Database on August 21, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2010-20112 actively exploited?
CVE-2010-20112 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 62.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2010-20112?
CVE-2010-20112 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2010-20112?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-20112, 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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