CVE-2018-0147

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 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
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 18%CVSS: 9.8Exploit: NoneExposed: 0

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

A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object. An exploit could allow the attacker to execute arbitrary commands on the device with root privileges. Cisco Bug IDs: CSCvh25988.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
96.9%
KEV
⚠ Exploited

Published

March 8, 2018

Last Modified

January 14, 2026

Advisory Details (4)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0147
generic🔴 Active Exploitation

Cisco Secure Access Control System Java Deserialization Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-acs2
generic
http://www.securitytracker.com/id/1040463
generic
http://www.securityfocus.com/bid/103328

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 61× in last 7d / 228× 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 411 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2018-0147?
CVE-2018-0147 is a critical vulnerability published on March 8, 2018. A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by…
When was CVE-2018-0147 disclosed?
CVE-2018-0147 was first published in the National Vulnerability Database on March 8, 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-2018-0147 actively exploited?
Yes. CISA added CVE-2018-0147 to the Known Exploited Vulnerabilities catalog on March 25, 2022, affecting Cisco Secure Access Control System (ACS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-0147?
CVE-2018-0147 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2018-0147?
CVE-2018-0147 affects Cisco Secure Access Control System (ACS). 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-2018-0147?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-0147, 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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