CVE-2017-3881

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 — 3 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: 99%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 the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. The Cluster Management Protocol utilizes Telnet internally as a signaling and command protocol between cluster members. The vulnerability is due to the combination of two factors: (1) the failure to restrict the use of CMP-specific Telnet options only to internal, local communications between cluster members and instead accept and process such options over any Telnet connection to an affected device; and (2) the incorrect processing of malformed CMP-specific Telnet options. An attacker could exploit this vulnerability by sending malformed CMP-specific Telnet options while establishing a Telnet session with an affected Cisco device configured to accept Telnet connections. An exploit could allow an attacker to execute arbitrary code and obtain full control of the device or cause a reload of the affected device. This affects Catalyst switches, Embedded Service 2020 switches, Enhanced Layer 2 EtherSwitch Service Module, Enhanced Layer 2/3 EtherSwitch Service Module, Gigabit Ethernet Switch Module (CGESM) for HP, IE Industrial Ethernet switches, ME 4924-10GE switch, RF Gateway 10, and SM-X Layer 2/3 EtherSwitch Service Module. Cisco Bug IDs: CSCvd48893.

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
99.9%
KEV
⚠ Exploited

Published

March 17, 2017

Last Modified

April 22, 2026

Advisory Details (5)

Auto-updated May 12, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Cisco IOS and IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
generic
http://www.securitytracker.com/id/1038059
generic
http://www.securityfocus.com/bid/97391
generic
http://www.securityfocus.com/bid/96960
generic🟡 PoC Available

Cisco Catalyst 2960 IOS 12.2(55)SE11 - 'ROCEM' Remote Code Execution - Hardware remote Exploit

https://www.exploit-db.com/exploits/41872/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 35× in last 7d / 198× 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 399 total refreshes for this CVE.

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

Publicly available exploits

(7 references)

Working exploit code is in the public domain (1 Metasploit module) (3 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC1337g/CVE-2017-3881
    First seen Jan 2, 2018

    credit to artkond

    Open source ↗
  • GitHub PoChomjxi0e/CVE-2017-3881-exploit-cisco-
    First seen Apr 20, 2017
    Open source ↗
  • Exploit-DBEDB-42122
    First seen Apr 12, 2017

    Cisco Catalyst 2960 IOS 12.2(55)SE1 - 'ROCEM' Remote Code Execution

    Open source ↗
  • Exploit-DBEDB-41872
    First seen Apr 12, 2017

    Cisco Catalyst 2960 IOS 12.2(55)SE11 - 'ROCEM' Remote Code Execution

    Open source ↗
  • GitHub PoCartkond/cisco-rce
    First seen Apr 10, 2017

    CVE-2017-3881 Cisco Catalyst Remote Code Execution PoC

    Open source ↗
  • Metasploitauxiliary/dos/cisco/ios_telnet_rocem✓ verified
    First seen Mar 17, 2017

    Cisco IOS Telnet Denial of Service

    Open source ↗
  • Nucleinetwork/cves/2017/CVE-2017-3881.yaml
    First seen Jan 1, 2017

    Cisco IOS 12.2(55)SE11 - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2017-3881?
CVE-2017-3881 is a critical vulnerability published on March 17, 2017. A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. The Cluster Management Protocol utilizes…
When was CVE-2017-3881 disclosed?
CVE-2017-3881 was first published in the National Vulnerability Database on March 17, 2017, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-3881 actively exploited?
Yes. CISA added CVE-2017-3881 to the Known Exploited Vulnerabilities catalog on March 25, 2022, affecting Cisco IOS and IOS XE. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-3881?
CVE-2017-3881 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2017-3881?
CVE-2017-3881 affects Cisco IOS and IOS XE. 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-2017-3881?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-3881, 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.

Dependency Blast Radius

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