CVE-2010-2731

MEDIUMCVSS v2 · 6.86.8—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.8 — 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:M/Au:N/C:P/I:P/A:P. 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 31.1% 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
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 31%CVSS v2: 6.8Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · public exploitExposed: 0

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

Unspecified vulnerability in Microsoft Internet Information Services (IIS) 5.1 on Windows XP SP3, when directory-based Basic Authentication is enabled, allows remote attackers to bypass intended access restrictions and execute ASP files via a crafted request, aka "Directory Authentication Bypass Vulnerability."

CVSS v2.0 (legacy)
6.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.8(low)
EG Risk
61(Track)
EG Risk 61/100SSVC: 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
Severity68% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
31%
EPSS %ILE
98%
KEV
Not listed

Published

September 15, 2010

Last Modified

April 29, 2026

References (4)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 24× 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 13:41 UTCEG score recompute▲ 6.80
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-23 14:14 UTCEPSS rescore
  4. 2026-07-23 01:02 UTCEG score recompute
  5. 2026-07-23 00:39 UTCEG score recompute▼ 0.20
  6. 2026-07-23 00:06 UTCEG score recompute▲ 0.20
  7. 2026-07-22 21:45 UTCEG score recompute
  8. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-06-28 04:52 UTCEPSS rescore
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  3. 2026-06-25 13:46 UTCEPSS rescore
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  30. 2026-06-01 13:49 UTCEPSS rescore
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  32. 2026-05-31 00:14 UTCEPSS rescore
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  34. 2026-05-29 13:40 UTCEPSS rescore
  35. 2026-05-29 10:20 UTCEG score recompute
  36. 2026-05-29 10:20 UTCGHSA enrichment
  37. 2026-05-28 13:42 UTCEPSS rescore
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  39. 2026-05-27 13:38 UTCEPSS rescore
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  43. 2026-05-26 07:16 UTCEPSS rescore
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  45. 2026-05-24 16:43 UTCEPSS rescore
  46. 2026-05-22 21:15 UTCEPSS rescore
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  49. 2026-05-20 22:37 UTCEPSS rescore
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  54. 2026-05-18 21:29 UTCEPSS rescore
  55. 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-14179✓ verified
    First seen Jul 2, 2010

    Microsoft IIS 5.0 - Authentication Bypass (MS10-065)

    Open source ↗
  • Metasploitauxiliary/admin/http/iis_auth_bypass✓ verified
    First seen Jul 2, 2010

    MS10-065 Microsoft IIS 5 NTFS Stream Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2010-2731?
CVE-2010-2731 is a medium vulnerability published on September 15, 2010. Unspecified vulnerability in Microsoft Internet Information Services (IIS) 5.1 on Windows XP SP3, when directory-based Basic Authentication is enabled, allows remote attackers to bypass intended access restrictions and execute ASP files via a crafted request, aka "Directory Authentication Bypass…
When was CVE-2010-2731 disclosed?
CVE-2010-2731 was first published in the National Vulnerability Database on September 15, 2010, 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-2010-2731 actively exploited?
CVE-2010-2731 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31% probability of exploitation in the next 30 days, which ranks it in the top 1.9% of all scored CVEs.
How do I remediate CVE-2010-2731?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-2731, 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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