CVE-2007-5116

HIGHCVSS v2 · 7.57.5—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.5 — 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: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 4.8% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS v2: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Buffer overflow in the polymorphic opcode support in the Regular Expression Engine (regcomp.c) in Perl 5.8 allows context-dependent attackers to execute arbitrary code by switching from byte to Unicode (UTF) characters in a regular expression.

CVSS v2.0 (legacy)
7.5HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.5(low)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity75% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

November 7, 2007

Last Modified

April 23, 2026

References (106)

Vendor Advisories for CVE-2007-5116(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibperl5.8 (5.8.8-7ubuntu3.1) @ gutsy2026-05-31ubuntu
redhatxml-commons-0:1.3.02-2jpp_1rh2010-08-04redhat
redhatperl-4:5.8.8-10.el5_0.22007-11-05redhat
redhatperl-4:5.8.8-5.el4s1_22007-11-05redhat

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

(7 across 7 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
perl—5.8.8-12—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
perl—5.8.8-12—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
perl—5.8.8-12—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
perl—5.8.8-12—
Debian:3.1(1)
PackageVulnerable rangeFixed inDependents
perl5.8.4-8 ... 5.8.4-8sarge5 (6 versions)5.8.4-8sarge6—
Debian:4.0(1)
PackageVulnerable rangeFixed inDependents
perl5.8.8-75.8.8-7etch1—
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
perl—5.8.8-11.1+lenny1—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 0× 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 111 total refreshes for this CVE.

  1. 2026-08-10 12:09 UTCOSV refresh
  2. 2026-08-08 16:30 UTCEPSS rescore
  3. 2026-08-07 16:20 UTCEPSS rescore
  4. 2026-08-06 13:41 UTCEPSS rescore
  5. 2026-08-05 19:11 UTCEPSS rescore
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  8. 2026-07-30 16:22 UTCEPSS rescore
  9. 2026-07-30 01:25 UTCEPSS rescore
  10. 2026-07-28 15:30 UTCEPSS rescore
  11. 2026-07-26 13:33 UTCEG score recompute▲ 7.50
  12. 2026-07-25 14:12 UTCEPSS rescore
  13. 2026-07-25 12:41 UTCOSV refresh
  14. 2026-07-24 14:11 UTCEPSS rescore
  15. 2026-07-23 14:13 UTCEPSS rescore
  16. 2026-07-23 00:54 UTCEG score recompute
  17. 2026-07-23 00:33 UTCEG score recompute
  18. 2026-07-22 23:59 UTCEG score recompute
  19. 2026-07-22 21:38 UTCEG score recompute
  20. 2026-07-22 14:03 UTCEPSS rescore
  21. 2026-07-21 15:19 UTCEPSS rescore
  22. 2026-07-20 17:03 UTCEPSS rescore
  23. 2026-07-18 09:59 UTCEPSS rescore
  24. 2026-07-16 16:58 UTCEPSS rescore
  25. 2026-07-15 16:54 UTCEPSS rescore
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  1. 2026-07-15 16:54 UTCEPSS rescore
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  4. 2026-07-11 08:22 UTCEPSS rescore
  5. 2026-07-08 15:09 UTCEPSS rescore
  6. 2026-07-08 07:27 UTCOSV refresh
  7. 2026-07-06 16:22 UTCEPSS rescore
  8. 2026-07-06 02:19 UTCEPSS rescore
  9. 2026-07-05 02:26 UTCEPSS rescore
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  20. 2026-06-28 04:52 UTCEPSS rescore
  21. 2026-06-27 03:04 UTCEPSS rescore
  22. 2026-06-25 13:46 UTCEPSS rescore
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  24. 2026-06-24 14:02 UTCEPSS rescore
  25. 2026-06-24 14:02 UTCEPSS rescore
  26. 2026-06-23 21:29 UTCEPSS rescore
  27. 2026-06-23 21:29 UTCEPSS rescore
  28. 2026-06-22 14:22 UTCEPSS rescore
  29. 2026-06-21 14:53 UTCEPSS rescore
  30. 2026-06-21 01:56 UTCEPSS rescore
  31. 2026-06-21 01:56 UTCEPSS rescore
  32. 2026-06-19 19:25 UTCOSV refresh
  33. 2026-06-19 19:22 UTCEPSS rescore
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  35. 2026-06-18 17:49 UTCEPSS rescore
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  37. 2026-06-17 17:49 UTCEPSS rescore
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  42. 2026-06-15 17:44 UTCEPSS rescore
  43. 2026-06-13 22:57 UTCEPSS rescore
  44. 2026-06-12 23:08 UTCEPSS rescore
  45. 2026-06-10 22:14 UTCEPSS rescore
  46. 2026-06-10 13:17 UTCEPSS rescore
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  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
  54. 2026-06-04 13:09 UTCEPSS rescore
  55. 2026-06-04 13:09 UTCEPSS rescore
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  57. 2026-06-02 20:10 UTCEPSS rescore
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  59. 2026-06-01 13:49 UTCEPSS rescore
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  61. 2026-06-01 13:49 UTCEPSS rescore
  62. 2026-05-31 22:28 UTCEPSS rescore
  63. 2026-05-31 22:28 UTCEPSS rescore
  64. 2026-05-31 00:13 UTCEPSS rescore
  65. 2026-05-31 00:13 UTCEPSS rescore
  66. 2026-05-31 00:12 UTCEG score recompute
  67. 2026-05-31 00:12 UTCVendor advisory
  68. 2026-05-31 00:12 UTCGHSA enrichment
  69. 2026-05-29 13:40 UTCEPSS rescore
  70. 2026-05-29 02:36 UTCOSV refresh
  71. 2026-05-28 13:42 UTCEPSS rescore
  72. 2026-05-28 13:42 UTCEPSS rescore
  73. 2026-05-28 13:42 UTCEPSS rescore
  74. 2026-05-27 13:38 UTCEPSS rescore
  75. 2026-05-27 13:37 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2007-5116?
CVE-2007-5116 is a high vulnerability published on November 7, 2007. Buffer overflow in the polymorphic opcode support in the Regular Expression Engine (regcomp.c) in Perl 5.8 allows context-dependent attackers to execute arbitrary code by switching from byte to Unicode (UTF) characters in a regular expression.
When was CVE-2007-5116 disclosed?
CVE-2007-5116 was first published in the National Vulnerability Database on November 7, 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-2007-5116 actively exploited?
CVE-2007-5116 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.7% of all scored CVEs.
How do I remediate CVE-2007-5116?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-5116, 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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