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
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 18%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 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)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
18%
EPSS %ILE
97%
KEV
⚠ Exploited

Published

March 8, 2018

Last Modified

January 14, 2026

Advisory Details (4)

Auto-updated Sep 3, 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🔴 Active Exploitation

CVE-2018-0147 - PSIRT.COM

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 52× in last 7d / 224× 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 749 total refreshes for this CVE.

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

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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