CVE-2007-0988

MEDIUMCVSS v2 · 4.34.3—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.3 — 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:N/I:N/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 2.3% 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
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS v2: 4.3Exploit: None knownExposed: 0

A fix is available — apply it.

The zend_hash_init function in PHP 5 before 5.2.1 and PHP 4 before 4.4.5, when running on a 64-bit platform, allows context-dependent attackers to cause a denial of service (infinite loop) by unserializing certain integer expressions, which only cause 32-bit arguments to be used after the check for a negative value, as demonstrated by an "a:2147483649:{" argument.

CVSS v2.0 (legacy)
4.3MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.3(low)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity43% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
83%
KEV
Not listed

Published

February 20, 2007

Last Modified

April 23, 2026

References (90)

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp5-odbc (5.0.5-2ubuntu1.7) @ breezy2026-05-31ubuntu
redhatphp-0:5.1.6-7.el52007-03-14redhat
redhatstronghold-php-0:4.1.2-122007-02-26redhat
redhatphp-0:5.1.6-3.el4s1.52007-02-22redhat
redhatphp-0:4.1.2-2.142007-02-21redhat
redhatphp-0:4.3.9-3.22.32007-02-19redhat

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

(1 across 1 ecosystem)
Debian:3.1(1)
PackageVulnerable rangeFixed inDependents
php44:4.3.10-15, 4:4.3.10-16, 4:4.3.10-17, 4:4.3.10-184:4.3.10-19—

Weakness Classification(1)

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

All Vendor Advisories

(6)

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.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-09-18 19:20 UTCEPSS rescore
  2. 2026-09-15 03:04 UTCEPSS rescore
  3. 2026-09-13 16:40 UTCEPSS rescore
  4. 2026-09-12 14:54 UTCEPSS rescore
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  17. 2026-07-28 15:30 UTCEPSS rescore
  18. 2026-07-26 13:31 UTCEG score recompute▲ 4.30
  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 21:36 UTCEG score recompute
  25. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-07-21 15:19 UTCEPSS rescore
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  3. 2026-07-16 16:58 UTCEPSS rescore
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  11. 2026-07-06 02:19 UTCEPSS rescore
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  19. 2026-06-30 23:18 UTCEPSS rescore
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  23. 2026-06-28 04:52 UTCEPSS rescore
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  28. 2026-06-23 21:29 UTCEPSS rescore
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  30. 2026-06-21 01:56 UTCEPSS rescore
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  35. 2026-06-18 17:49 UTCEPSS rescore
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  39. 2026-06-16 17:49 UTCEPSS rescore
  40. 2026-06-16 17:49 UTCEPSS rescore
  41. 2026-06-15 17:44 UTCEPSS rescore
  42. 2026-06-14 23:13 UTCEPSS rescore
  43. 2026-06-13 22:57 UTCEPSS rescore
  44. 2026-06-13 22:57 UTCEPSS rescore
  45. 2026-06-12 23:08 UTCEPSS rescore
  46. 2026-06-08 14:13 UTCEPSS rescore
  47. 2026-06-07 15:21 UTCEPSS rescore
  48. 2026-06-07 15:21 UTCEPSS rescore
  49. 2026-06-06 13:44 UTCEPSS rescore
  50. 2026-06-06 13:44 UTCEPSS rescore
  51. 2026-06-05 22:44 UTCEPSS rescore
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  53. 2026-06-05 06:07 UTCEPSS rescore
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  60. 2026-05-31 22:28 UTCEPSS rescore
  61. 2026-05-31 22:28 UTCEPSS rescore
  62. 2026-05-31 04:13 UTCEG score recompute
  63. 2026-05-31 04:13 UTCVendor advisory
  64. 2026-05-31 04:13 UTCGHSA enrichment
  65. 2026-05-31 00:13 UTCEPSS rescore
  66. 2026-05-31 00:13 UTCEPSS rescore
  67. 2026-05-29 13:40 UTCEPSS rescore
  68. 2026-05-28 13:42 UTCEPSS rescore
  69. 2026-05-28 13:42 UTCEPSS rescore
  70. 2026-05-27 13:37 UTCEPSS rescore
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  74. 2026-05-26 07:16 UTCEPSS rescore
  75. 2026-05-26 07:16 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2007-0988?
CVE-2007-0988 is a medium vulnerability published on February 20, 2007. The zendhashinit function in PHP 5 before 5.2.1 and PHP 4 before 4.4.5, when running on a 64-bit platform, allows context-dependent attackers to cause a denial of service (infinite loop) by unserializing certain integer expressions, which only cause 32-bit arguments to be used after the check for a…
When was CVE-2007-0988 disclosed?
CVE-2007-0988 was first published in the National Vulnerability Database on February 20, 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-2007-0988 actively exploited?
CVE-2007-0988 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 16.7% of all scored CVEs.
How do I remediate CVE-2007-0988?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-0988, 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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