CVE-2013-2944

MEDIUMCVSS v2 · 4.94.9—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.9 — 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:S/C:P/I:P/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 1.6% 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
Trending — 3 sources updated this week
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS v2: 4.9Exploit: None knownExposed: 0

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

strongSwan 4.3.5 through 5.0.3, when using the OpenSSL plugin for ECDSA signature verification, allows remote attackers to authenticate as other users via an invalid signature.

CVSS v2.0 (legacy)
4.9MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.9(low)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity49% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
73%
KEV
Not listed

Published

May 2, 2013

Last Modified

April 29, 2026

References (14)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 36× 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 103 total refreshes for this CVE.

  1. 2026-07-26 13:48 UTCEG score recompute▲ 4.90
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-23 14:14 UTCEPSS rescore
  4. 2026-07-23 01:10 UTCEG score recompute
  5. 2026-07-23 00:13 UTCEG score recompute
  6. 2026-07-22 21:51 UTCEG score recompute
  7. 2026-07-22 14:04 UTCEPSS rescore
  8. 2026-07-22 14:04 UTCEPSS rescore
  9. 2026-07-22 12:48 UTCOSV refresh
  10. 2026-07-21 15:21 UTCEPSS rescore
  11. 2026-07-20 17:03 UTCEPSS rescore
  12. 2026-07-20 17:03 UTCEPSS rescore
  13. 2026-07-19 14:27 UTCEPSS rescore
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  15. 2026-07-19 02:25 UTCEPSS rescore
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  24. 2026-07-11 08:23 UTCEPSS rescore
  25. 2026-07-09 19:05 UTCEPSS rescore
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  1. 2026-07-08 15:10 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-06 02:19 UTCEPSS rescore
  4. 2026-07-05 08:29 UTCOSV refresh
  5. 2026-07-05 02:26 UTCEPSS rescore
  6. 2026-07-04 06:27 UTCEPSS rescore
  7. 2026-07-01 15:02 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
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  10. 2026-06-29 14:02 UTCEPSS rescore
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  14. 2026-06-27 03:05 UTCEPSS rescore
  15. 2026-06-25 13:46 UTCEPSS rescore
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  18. 2026-06-23 21:30 UTCEPSS rescore
  19. 2026-06-22 14:22 UTCEPSS rescore
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  21. 2026-06-21 14:53 UTCEPSS rescore
  22. 2026-06-19 19:23 UTCEPSS rescore
  23. 2026-06-19 19:22 UTCEPSS rescore
  24. 2026-06-18 17:49 UTCEPSS rescore
  25. 2026-06-18 17:49 UTCEPSS rescore
  26. 2026-06-17 17:49 UTCEPSS rescore
  27. 2026-06-17 17:49 UTCEPSS rescore
  28. 2026-06-16 19:35 UTCOSV refresh
  29. 2026-06-16 17:49 UTCEPSS rescore
  30. 2026-06-16 17:49 UTCEPSS rescore
  31. 2026-06-15 17:44 UTCEPSS rescore
  32. 2026-06-14 23:14 UTCEPSS rescore
  33. 2026-06-13 22:57 UTCEPSS rescore
  34. 2026-06-12 23:08 UTCEPSS rescore
  35. 2026-06-11 13:56 UTCEPSS rescore
  36. 2026-06-10 13:18 UTCEPSS rescore
  37. 2026-06-08 14:14 UTCEPSS rescore
  38. 2026-06-07 15:22 UTCEPSS rescore
  39. 2026-06-06 13:45 UTCEPSS rescore
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  41. 2026-06-05 22:44 UTCEPSS rescore
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  45. 2026-06-02 20:10 UTCEPSS rescore
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  47. 2026-06-01 13:49 UTCEPSS rescore
  48. 2026-06-01 13:49 UTCEPSS rescore
  49. 2026-05-31 22:28 UTCEPSS rescore
  50. 2026-05-31 22:28 UTCEPSS rescore
  51. 2026-05-31 00:14 UTCEPSS rescore
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  53. 2026-05-29 13:41 UTCEPSS rescore
  54. 2026-05-29 13:41 UTCEPSS rescore
  55. 2026-05-29 00:03 UTCEG score recompute
  56. 2026-05-29 00:02 UTCGHSA enrichment
  57. 2026-05-28 17:36 UTCOSV refresh
  58. 2026-05-28 13:42 UTCEPSS rescore
  59. 2026-05-28 13:42 UTCEPSS rescore
  60. 2026-05-28 13:42 UTCEPSS rescore
  61. 2026-05-27 13:38 UTCEPSS rescore
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  63. 2026-05-26 13:41 UTCEPSS rescore
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  65. 2026-05-26 07:16 UTCEPSS rescore
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  67. 2026-05-24 16:43 UTCEPSS rescore
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  71. 2026-05-21 22:39 UTCEPSS rescore
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  73. 2026-05-20 22:37 UTCEPSS rescore
  74. 2026-05-20 11:21 UTCEPSS rescore
  75. 2026-05-20 11:21 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2013-2944?
CVE-2013-2944 is a medium vulnerability published on May 2, 2013. strongSwan 4.3.5 through 5.0.3, when using the OpenSSL plugin for ECDSA signature verification, allows remote attackers to authenticate as other users via an invalid signature.
When was CVE-2013-2944 disclosed?
CVE-2013-2944 was first published in the National Vulnerability Database on May 2, 2013, 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-2013-2944 actively exploited?
CVE-2013-2944 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 27.0% of all scored CVEs.
How do I remediate CVE-2013-2944?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-2944, 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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