The fabric-interconnect component in Cisco Unified Computing System (UCS) does not properly verify X.509 certificates, which allows man-in-the-middle attackers to watch SSL KVM video-channel traffic or modify this traffic via a crafted certificate, aka Bug ID CSCtr73033.
CVE-2012-4117
MEDIUMCVSS v2 · 5.85.8—
EchelonGraph scoreLOW confidence
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.8 — 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:N/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 0.5% 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
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS v2: 5.8Exploit: None knownExposed services: —
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
Internet exposure
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- CVSS v2.0 (legacy)
- 5.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 5.8MEDIUMlow confidence
- EG Risk
- 31EG Risk 31/100CISA SSVC
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 computedSeverity58% × 45%Exploitation1% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix. - EPSS PROB
- 0.5%
- EPSS %ILE
- 42nd
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 19, 2013
Last Modified
April 29, 2026
References (2)
- psirt@ciscohttp://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4117
- af854a3a-2127-422b-91ae-364da2661108http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4117
Vendor Advisories for CVE-2012-4117
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Related CVEs(same CWE)· as of October 4, 2026
Frequently asked(4)
What is CVE-2012-4117?
CVE-2012-4117 is a medium vulnerability published on October 19, 2013. The fabric-interconnect component in Cisco Unified Computing System (UCS) does not properly verify X.509 certificates, which allows man-in-the-middle attackers to watch SSL KVM video-channel traffic or modify this traffic via a crafted certificate, aka Bug ID CSCtr73033.
When was CVE-2012-4117 disclosed?
CVE-2012-4117 was first published on October 19, 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-2012-4117 actively exploited?
CVE-2012-4117 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
How do I remediate CVE-2012-4117?
No fix for CVE-2012-4117 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.
Dependency Blast Radius
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