CVE-2007-1718

HIGHCVSS v2 · 7.87.8—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.8 — v2 rates that HIGH (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:N/I:C/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 6.7% 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
7.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), public exploit)
CISA-KEV: Not listedEPSS PROB: 7%CVSS v2: 7.8Exploit: Exploit-DB (verified) · public exploitExposed: 0

A fix is available — apply it.

CRLF injection vulnerability in the mail function in PHP 4.0.0 through 4.4.6 and 5.0.0 through 5.2.1 allows remote attackers to inject arbitrary e-mail headers and possibly conduct spam attacks via a control character immediately following folding of the (1) Subject or (2) To parameter, as demonstrated by a parameter containing a "\r\n\t\n" sequence, related to an increment bug in the SKIP_LONG_HEADER_SEP macro.

CVSS v2.0 (legacy)
7.8HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.8(low)
EG Risk
66(Track)
EG Risk 66/100SSVC: 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
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
7%
EPSS %ILE
94%
KEV
Not listed

Published

March 28, 2007

Last Modified

April 23, 2026

References (52)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp5-sqlite (5.2.1-0ubuntu1.1) @ feisty2026-05-31ubuntu
redhatphp-0:5.1.6-11.el52007-04-20redhat
redhatphp-0:4.3.9-3.22.42007-04-16redhat
redhatphp-0:5.1.6-3.el4s1.62007-04-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 3 ecosystems)
Debian:4.0(2)
PackageVulnerable rangeFixed inDependents
php46:4.4.4-8+etch16:4.4.4-8+etch2—
php55.2.0-8+etch15.2.0-8+etch3—
Debian:5.0(2)
PackageVulnerable rangeFixed inDependents
php44.0.3pl1-0potato3 ... 6:4.4.4-9 (46 versions)6:4.4.4-9+lenny1—
php5—5.2.0-10+lenny1—
Debian:3.1(1)
PackageVulnerable rangeFixed inDependents
php44:4.3.10-15, 4:4.3.10-16, 4:4.3.10-17, 4:4.3.10-18, 4:4.3.10-194:4.3.10-20—

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 1× in last 7d / 9× 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. 2026-09-18 19:20 UTCEPSS rescore
  2. 2026-09-15 03:04 UTCEPSS rescore
  3. 2026-09-13 16:40 UTCEPSS rescore
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  9. 2026-08-30 01:14 UTCEPSS rescore
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  17. 2026-07-28 15:30 UTCEPSS rescore
  18. 2026-07-26 13:32 UTCEG score recompute▲ 7.80
  19. 2026-07-25 14:11 UTCEPSS rescore
  20. 2026-07-24 14:11 UTCEPSS rescore
  21. 2026-07-23 00:53 UTCEG score recompute
  22. 2026-07-23 00:32 UTCEG score recompute
  23. 2026-07-22 23:57 UTCEG score recompute
  24. 2026-07-22 21:37 UTCEG score recompute
  25. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-07-21 15:19 UTCEPSS rescore
  2. 2026-07-20 17:02 UTCEPSS rescore
  3. 2026-07-16 16:58 UTCEPSS rescore
  4. 2026-07-15 16:54 UTCEPSS rescore
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  6. 2026-07-13 22:25 UTCEPSS rescore
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  18. 2026-06-30 23:18 UTCEPSS rescore
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  20. 2026-06-28 04:52 UTCEPSS rescore
  21. 2026-06-25 13:46 UTCEPSS rescore
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  23. 2026-06-24 14:02 UTCEPSS rescore
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  25. 2026-06-23 21:29 UTCEPSS rescore
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  27. 2026-06-19 19:22 UTCEPSS rescore
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  29. 2026-06-18 17:49 UTCEPSS rescore
  30. 2026-06-18 17:49 UTCEPSS rescore
  31. 2026-06-17 17:49 UTCEPSS rescore
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  39. 2026-06-12 23:08 UTCEPSS rescore
  40. 2026-06-07 15:21 UTCEPSS rescore
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  42. 2026-06-06 13:44 UTCEPSS rescore
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  44. 2026-06-05 22:44 UTCEPSS rescore
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  51. 2026-06-01 13:49 UTCEPSS rescore
  52. 2026-06-01 13:49 UTCEPSS rescore
  53. 2026-05-31 03:32 UTCEG score recompute
  54. 2026-05-31 03:32 UTCVendor advisory
  55. 2026-05-31 03:32 UTCGHSA enrichment
  56. 2026-05-31 00:13 UTCEPSS rescore
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  58. 2026-05-29 13:40 UTCEPSS rescore
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  63. 2026-05-26 13:41 UTCEPSS rescore
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  65. 2026-05-24 16:42 UTCEPSS rescore
  66. 2026-05-22 21:15 UTCEPSS rescore
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  69. 2026-05-20 22:36 UTCEPSS rescore
  70. 2026-05-20 11:20 UTCEPSS rescore
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  72. 2026-05-18 21:29 UTCEPSS rescore
  73. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • Exploit-DBEDB-29784✓ verified
    First seen Nov 26, 2007

    PHP 5.2.1 - Folded Mail Headers Email Header Injection

    Open source ↗

Related CVEs(same product + same vendor)

Frequently asked(4)

What is CVE-2007-1718?
CVE-2007-1718 is a high vulnerability published on March 28, 2007. CRLF injection vulnerability in the mail function in PHP 4.0.0 through 4.4.6 and 5.0.0 through 5.2.1 allows remote attackers to inject arbitrary e-mail headers and possibly conduct spam attacks via a control character immediately following folding of the (1) Subject or (2) To parameter, as…
When was CVE-2007-1718 disclosed?
CVE-2007-1718 was first published in the National Vulnerability Database on March 28, 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-2007-1718 actively exploited?
CVE-2007-1718 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7% probability of exploitation in the next 30 days, which ranks it in the top 6.3% of all scored CVEs.
How do I remediate CVE-2007-1718?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-1718, 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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