CVE-2018-0158

HIGHNVD 8.69.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.6 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
8.6
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 7%CVSS: 8.6Exploit: NoneExposed: 0

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

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device to be processed. A successful exploit could cause an affected device to continuously consume memory and eventually reload, resulting in a DoS condition. Cisco Bug IDs: CSCvf22394.

CVSS v3
8.6
EG Score
9.0(high)
EPSS
93.7%
KEV
⚠ Exploited

Published

March 28, 2018

Last Modified

January 14, 2026

Advisory Details (3)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Cisco IOS and IOS XE Software Internet Key Exchange Memory Leak Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-ike
generic
http://www.securitytracker.com/id/1040595
generic
http://www.securityfocus.com/bid/103566

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 102× in last 7d / 435× 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 621 total refreshes for this CVE.

  1. 2026-07-11 18:49 UTCEG score recompute
  2. 2026-07-11 18:49 UTCGHSA enrichment
  3. 2026-07-11 15:07 UTCEG score recompute
  4. 2026-07-11 15:06 UTCGHSA enrichment
  5. 2026-07-11 11:23 UTCEG score recompute
  6. 2026-07-11 11:23 UTCGHSA enrichment
  7. 2026-07-11 08:24 UTCEPSS rescore
  8. 2026-07-11 07:40 UTCEG score recompute
  9. 2026-07-11 07:40 UTCGHSA enrichment
  10. 2026-07-11 03:57 UTCEG score recompute
  11. 2026-07-11 03:57 UTCGHSA enrichment
  12. 2026-07-11 00:14 UTCEG score recompute
  13. 2026-07-11 00:14 UTCGHSA enrichment
  14. 2026-07-10 20:31 UTCEG score recompute
  15. 2026-07-10 20:31 UTCGHSA enrichment
  16. 2026-07-10 17:52 UTCCISA KEV update
  17. 2026-07-10 16:49 UTCEG score recompute
  18. 2026-07-10 16:49 UTCGHSA enrichment
  19. 2026-07-10 13:07 UTCEG score recompute
  20. 2026-07-10 13:07 UTCGHSA enrichment
  21. 2026-07-10 09:25 UTCEG score recompute
  22. 2026-07-10 09:24 UTCGHSA enrichment
  23. 2026-07-10 05:41 UTCEG score recompute
  24. 2026-07-10 05:41 UTCGHSA enrichment
  25. 2026-07-10 01:58 UTCEG score recompute
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  1. 2026-07-10 01:58 UTCGHSA enrichment
  2. 2026-07-09 22:14 UTCEG score recompute
  3. 2026-07-09 22:14 UTCGHSA enrichment
  4. 2026-07-09 19:06 UTCEPSS rescore
  5. 2026-07-09 18:31 UTCEG score recompute
  6. 2026-07-09 18:31 UTCGHSA enrichment
  7. 2026-07-09 14:49 UTCEG score recompute
  8. 2026-07-09 14:49 UTCGHSA enrichment
  9. 2026-07-09 11:04 UTCEG score recompute
  10. 2026-07-09 11:04 UTCGHSA enrichment
  11. 2026-07-09 07:22 UTCEG score recompute
  12. 2026-07-09 07:22 UTCGHSA enrichment
  13. 2026-07-09 03:37 UTCEG score recompute
  14. 2026-07-09 03:37 UTCGHSA enrichment
  15. 2026-07-08 23:54 UTCEG score recompute
  16. 2026-07-08 23:54 UTCGHSA enrichment
  17. 2026-07-08 20:12 UTCEG score recompute
  18. 2026-07-08 20:11 UTCGHSA enrichment
  19. 2026-07-08 16:28 UTCEG score recompute
  20. 2026-07-08 16:28 UTCGHSA enrichment
  21. 2026-07-08 15:11 UTCEPSS rescore
  22. 2026-07-08 12:45 UTCEG score recompute
  23. 2026-07-08 12:44 UTCGHSA enrichment
  24. 2026-07-08 09:01 UTCEG score recompute
  25. 2026-07-08 09:01 UTCGHSA enrichment
  26. 2026-07-08 05:18 UTCEG score recompute
  27. 2026-07-08 05:18 UTCGHSA enrichment
  28. 2026-07-08 01:34 UTCEG score recompute
  29. 2026-07-08 01:34 UTCGHSA enrichment
  30. 2026-07-07 21:52 UTCEG score recompute
  31. 2026-07-07 21:51 UTCGHSA enrichment
  32. 2026-07-07 19:01 UTCCISA KEV update
  33. 2026-07-07 18:08 UTCEG score recompute
  34. 2026-07-07 18:08 UTCGHSA enrichment
  35. 2026-07-07 17:16 UTCCISA KEV update
  36. 2026-07-07 14:24 UTCEG score recompute
  37. 2026-07-07 14:24 UTCGHSA enrichment
  38. 2026-07-07 13:42 UTCEPSS rescore
  39. 2026-07-07 10:39 UTCEG score recompute
  40. 2026-07-07 10:39 UTCGHSA enrichment
  41. 2026-07-07 06:52 UTCEG score recompute
  42. 2026-07-07 06:52 UTCGHSA enrichment
  43. 2026-07-07 03:08 UTCEG score recompute
  44. 2026-07-07 03:08 UTCGHSA enrichment
  45. 2026-07-06 23:25 UTCEG score recompute
  46. 2026-07-06 23:25 UTCGHSA enrichment
  47. 2026-07-06 19:42 UTCEG score recompute
  48. 2026-07-06 19:42 UTCGHSA enrichment
  49. 2026-07-06 16:24 UTCEPSS rescore
  50. 2026-07-06 16:24 UTCEPSS rescore
  51. 2026-07-06 15:56 UTCEG score recompute
  52. 2026-07-06 15:56 UTCGHSA enrichment
  53. 2026-07-06 12:13 UTCEG score recompute
  54. 2026-07-06 12:13 UTCGHSA enrichment
  55. 2026-07-06 08:31 UTCEG score recompute
  56. 2026-07-06 08:30 UTCGHSA enrichment
  57. 2026-07-06 04:45 UTCEG score recompute
  58. 2026-07-06 04:45 UTCGHSA enrichment
  59. 2026-07-06 02:20 UTCEPSS rescore
  60. 2026-07-06 02:20 UTCEPSS rescore
  61. 2026-07-06 01:01 UTCEG score recompute
  62. 2026-07-06 01:01 UTCGHSA enrichment
  63. 2026-07-05 21:17 UTCEG score recompute
  64. 2026-07-05 21:17 UTCGHSA enrichment
  65. 2026-07-05 17:35 UTCEG score recompute
  66. 2026-07-05 17:35 UTCGHSA enrichment
  67. 2026-07-05 13:51 UTCEG score recompute
  68. 2026-07-05 13:50 UTCGHSA enrichment
  69. 2026-07-05 10:07 UTCEG score recompute
  70. 2026-07-05 10:06 UTCGHSA enrichment
  71. 2026-07-05 06:23 UTCEG score recompute
  72. 2026-07-05 06:23 UTCGHSA enrichment
  73. 2026-07-05 02:38 UTCEG score recompute
  74. 2026-07-05 02:38 UTCGHSA enrichment
  75. 2026-07-05 02:27 UTCEPSS rescore

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Frequently asked(6)

What is CVE-2018-0158?
CVE-2018-0158 is a high vulnerability published on March 28, 2018. A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due…
When was CVE-2018-0158 disclosed?
CVE-2018-0158 was first published in the National Vulnerability Database on March 28, 2018, with the most recent update on January 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-0158 actively exploited?
Yes. CISA added CVE-2018-0158 to the Known Exploited Vulnerabilities catalog on March 3, 2022, affecting Cisco IOS Software and Cisco IOS XE Software. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-0158?
CVE-2018-0158 has a CVSS v3 base score of 8.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-0158?
CVE-2018-0158 affects Cisco IOS Software and Cisco IOS XE Software. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2018-0158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-0158, 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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