CVE-2012-10053

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 35% 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.

Simple Web Server 2.2 rc2 contains a stack-based buffer overflow vulnerability in its handling of the Connection HTTP header. When a remote attacker sends an overly long string in this header, the server uses vsprintf() without proper bounds checking, leading to a buffer overflow on the stack. This flaw allows remote attackers to execute arbitrary code with the privileges of the web server process. The vulnerability is triggered before authentication.

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
65.0%
KEV
Not listed

Published

August 8, 2025

Last Modified

April 15, 2026

Advisory Details (6)

Auto-updated Jul 4, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Simple Web Server - Connection Header Buffer Overflow (Metasploit) - Windows remote Exploit

https://www.exploit-db.com/exploits/20028
generic🟡 PoC Available

Simple Web Server 2.2 rc2 - Remote Buffer Overflow - Windows remote Exploit

https://www.exploit-db.com/exploits/19937
generic
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/sws_connection_bof.rb
generic

Simple Web Server Connection Header Buffer Overflow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/simple-web-server-connection-header-buffer-overflow
generic

PMSoftware: Simple Web Server

http://www.pmx.it/software/sws.asp
generic

SimpleWebServer 2.2-rc2 – Remote Buffer Overflow Exploit | Ghost in the Lab

http://ghostinthelab.wordpress.com/2012/07/19/simplewebserver-2-2-rc2-remote-buffer-overflow-exploit/

Weakness Classification(1)

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

Data Freshness Timeline

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

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 Metasploit modules). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/windows/http/sws_connection_bof✓ verified
    First seen Jul 20, 2012

    Simple Web Server Connection Header Buffer Overflow

    Open source ↗
  • Metasploitexploit/windows/fileformat/somplplayer_m3u✓ verified
    First seen Jan 22, 2010

    S.O.M.P.L 1.0 Player Buffer Overflow

    Open source ↗

Frequently asked(5)

What is CVE-2012-10053?
CVE-2012-10053 is a critical vulnerability published on August 8, 2025. Simple Web Server 2.2 rc2 contains a stack-based buffer overflow vulnerability in its handling of the Connection HTTP header. When a remote attacker sends an overly long string in this header, the server uses vsprintf() without proper bounds checking, leading to a buffer overflow on the stack. This…
When was CVE-2012-10053 disclosed?
CVE-2012-10053 was first published in the National Vulnerability Database on August 8, 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-2012-10053 actively exploited?
CVE-2012-10053 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2012-10053?
CVE-2012-10053 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2012-10053?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-10053, 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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