CVE-2007-4727

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 12.9% 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
Elevated
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 13%CVSS v2: 6.8Exploit: Elevated riskExposed: 0

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

Buffer overflow in the fcgi_env_add function in mod_proxy_backend_fastcgi.c in the mod_fastcgi extension in lighttpd before 1.4.18 allows remote attackers to overwrite arbitrary CGI variables and execute arbitrary code via an HTTP request with a long content length, as demonstrated by overwriting the SCRIPT_FILENAME variable, aka a "header overflow."

CVSS v2.0 (legacy)
6.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.8(low)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
13%
EPSS %ILE
96%
KEV
Not listed

Published

September 12, 2007

Last Modified

April 23, 2026

References (36)

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
lighttpd—1.4.18-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
lighttpd—1.4.18-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
lighttpd—1.4.18-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
lighttpd—1.4.18-1—
Debian:4.0(1)
PackageVulnerable rangeFixed inDependents
lighttpd1.4.13-4, 1.4.13-4etch1, 1.4.13-4etch2, 1.4.13-4etch31.4.13-4etch4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 1× in last 7d / 10× 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 107 total refreshes for this CVE.

  1. 2026-08-26 23:47 UTCOSV refresh
  2. 2026-08-10 13:56 UTCOSV refresh
  3. 2026-08-08 16:30 UTCEPSS rescore
  4. 2026-08-07 16:20 UTCEPSS rescore
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  12. 2026-07-26 13:33 UTCEG score recompute▲ 6.80
  13. 2026-07-25 15:00 UTCOSV refresh
  14. 2026-07-25 14:12 UTCEPSS rescore
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  17. 2026-07-23 00:54 UTCEG score recompute
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  19. 2026-07-22 23:58 UTCEG score recompute
  20. 2026-07-22 21:38 UTCEG score recompute
  21. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-07-15 16:54 UTCEPSS rescore
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  5. 2026-07-08 09:27 UTCOSV refresh
  6. 2026-07-06 16:22 UTCEPSS rescore
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  26. 2026-06-21 01:56 UTCEPSS rescore
  27. 2026-06-21 01:56 UTCEPSS rescore
  28. 2026-06-19 21:06 UTCOSV refresh
  29. 2026-06-19 19:22 UTCEPSS rescore
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  31. 2026-06-18 17:49 UTCEPSS rescore
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  56. 2026-05-31 22:28 UTCEPSS rescore
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  58. 2026-05-31 00:59 UTCEG score recompute
  59. 2026-05-31 00:59 UTCGHSA enrichment
  60. 2026-05-31 00:13 UTCEPSS rescore
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  67. 2026-05-27 13:38 UTCEPSS rescore
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  74. 2026-05-24 16:42 UTCEPSS rescore
  75. 2026-05-22 21:15 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2007-4727?
CVE-2007-4727 is a medium vulnerability published on September 12, 2007. Buffer overflow in the fcgienvadd function in modproxybackendfastcgi.c in the modfastcgi extension in lighttpd before 1.4.18 allows remote attackers to overwrite arbitrary CGI variables and execute arbitrary code via an HTTP request with a long content length, as demonstrated by overwriting the…
When was CVE-2007-4727 disclosed?
CVE-2007-4727 was first published in the National Vulnerability Database on September 12, 2007, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2007-4727 actively exploited?
CVE-2007-4727 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13% probability of exploitation in the next 30 days, which ranks it in the top 4.0% of all scored CVEs.
How do I remediate CVE-2007-4727?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-4727, 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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