CVE-2012-4031

MEDIUMCVSS v2 · 5.05.0▲
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:N/C:P/I:N/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 52.3% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
5.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 52%
CISA-KEV: Not listedEPSS PROB: 52%CVSS v2: 5.0Exploit: NoneExposed: 0

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

Multiple directory traversal vulnerabilities in src/acloglogin.php in Wangkongbao CNS-1000 and 1100 allow remote attackers to read arbitrary files via a .. (dot dot) in the (1) lang or (2) langid cookie to port 85.

CVSS v2.0 (legacy)
5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.0(low)
EG Risk
53(Track)
EG Risk 53/100SSVC: Track

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
Severity50% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
52%
EPSS %ILE
99%
KEV
Not listed

Published

July 17, 2012

Last Modified

April 29, 2026

References (10)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 28× 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. 2026-07-26 13:46 UTCEG score recompute▲ 5.00
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-23 14:14 UTCEPSS rescore
  4. 2026-07-23 01:07 UTCEG score recompute▼ 3.60
  5. 2026-07-23 00:11 UTCEG score recompute▲ 3.60
  6. 2026-07-22 21:50 UTCEG score recompute
  7. 2026-07-22 14:04 UTCEPSS rescore
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  9. 2026-07-21 15:21 UTCEPSS rescore
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  14. 2026-07-16 16:58 UTCEPSS rescore
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  20. 2026-07-06 02:19 UTCEPSS rescore
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  25. 2026-06-28 04:53 UTCEPSS rescore
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  1. 2026-06-28 04:53 UTCEPSS rescore
  2. 2026-06-27 03:05 UTCEPSS rescore
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  4. 2026-06-25 13:46 UTCEPSS rescore
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  8. 2026-06-23 21:30 UTCEPSS rescore
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  20. 2026-06-13 22:57 UTCEPSS rescore
  21. 2026-06-12 23:08 UTCEPSS rescore
  22. 2026-06-11 13:56 UTCEPSS rescore
  23. 2026-06-10 22:14 UTCEPSS rescore
  24. 2026-06-08 14:14 UTCEPSS rescore
  25. 2026-06-08 14:14 UTCEPSS rescore
  26. 2026-06-07 15:22 UTCEPSS rescore
  27. 2026-06-07 15:22 UTCEPSS rescore
  28. 2026-06-05 22:44 UTCEPSS rescore
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  30. 2026-06-05 06:08 UTCEPSS rescore
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  34. 2026-06-01 13:49 UTCEPSS rescore
  35. 2026-05-31 00:14 UTCEPSS rescore
  36. 2026-05-31 00:14 UTCEPSS rescore
  37. 2026-05-29 13:41 UTCEPSS rescore
  38. 2026-05-29 03:56 UTCEG score recompute
  39. 2026-05-29 03:56 UTCGHSA enrichment
  40. 2026-05-27 13:38 UTCEPSS rescore
  41. 2026-05-27 13:38 UTCEPSS rescore
  42. 2026-05-26 13:41 UTCEPSS rescore
  43. 2026-05-26 13:41 UTCEPSS rescore
  44. 2026-05-24 16:43 UTCEPSS rescore
  45. 2026-05-21 22:39 UTCEPSS rescore
  46. 2026-05-20 22:37 UTCEPSS rescore
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  49. 2026-05-18 21:29 UTCEPSS rescore
  50. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-19526
    First seen Jul 2, 2012

    WANGKONGBAO CNS-1000 UTM IPS-FW - Directory Traversal (Metasploit)

    Open source ↗
  • Metasploitauxiliary/scanner/http/wangkongbao_traversal✓ verified
    First seen Jan 1, 2012

    WANGKONGBAO CNS-1000 and 1100 UTM Directory Traversal

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2012-4031?
CVE-2012-4031 is a medium vulnerability published on July 17, 2012. Multiple directory traversal vulnerabilities in src/acloglogin.php in Wangkongbao CNS-1000 and 1100 allow remote attackers to read arbitrary files via a .. (dot dot) in the (1) lang or (2) langid cookie to port 85.
When was CVE-2012-4031 disclosed?
CVE-2012-4031 was first published in the National Vulnerability Database on July 17, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-4031 actively exploited?
CVE-2012-4031 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52% probability of exploitation in the next 30 days, which ranks it in the top 1.2% of all scored CVEs.
How do I remediate CVE-2012-4031?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-4031, 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.

Dependency Blast Radius

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