CVE-2017-12477

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 68%
  • Public exploit code is available (Metasploit, Exploit-DB, marked verified by Exploit-DB)
CISA-KEV: Not listedEPSS PROB: 68%CVSS: 9.8Exploit: Metasploit · Exploit-DB (verified)Exposed services: Not assessed

No fix has been recorded since the CVE record was published in 2017 — isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

It was discovered that the bpserverd proprietary protocol in Unitrends Backup (UB) before 10.0.0, as invoked through xinetd, has an issue in which its authentication can be bypassed. A remote attacker could use this issue to execute arbitrary commands with root privilege on the target system.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
76
EG Risk 76/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation68% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix has been recorded since the CVE record was published in 2017. Isolate the affected system within your standard update timelines at low or medium mission impact and sooner than that at high (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.
EPSS PROB
68%
EPSS %ILE
99th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

No fix has been recorded since the CVE record was published in 2017. Isolate the affected system within your standard update timelines at low or medium mission impact and sooner than that at high (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

August 7, 2017

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Oct 6, 2026
No fix on record since 2017.
generic

Unitrends UEB 9 - bpserverd Authentication Bypass Remote Command Execution (Metasploit) - Linux_x86 remote Exploit

https://www.exploit-db.com/exploits/43031/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 16× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 85 of 102 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 15 repeat rows among the latest 100 are merged into the row they repeat. The 17 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 19:55 UTCEPSS rescoreEPSS 68% · 99th percentile
  2. 2026-10-09 20:02 UTCEPSS rescoreEPSS 68% · 99th percentile
  3. 2026-10-08 16:35 UTCEPSS rescoreEPSS 68% · 99th percentile
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  5. 2026-10-06 15:11 UTCEPSS rescoreEPSS 68% · 99th percentile
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  7. 2026-09-30 14:58 UTCEPSS rescoreEPSS 68% · 99th percentile
  8. 2026-09-30 09:24 UTCEG score recompute
  9. 2026-09-26 15:53 UTCEPSS rescoreEPSS 68% · 99th percentile
  10. 2026-09-24 13:59 UTCEPSS rescoreEPSS 68% · 99th percentile
  11. 2026-09-19 15:36 UTCEPSS rescoreEPSS 68% · 99th percentile
  12. 2026-09-18 19:22 UTCEPSS rescoreEPSS 68% · 99th percentile
  13. 2026-09-17 19:22 UTCEPSS rescoreEPSS 68% · 99th percentile
  14. 2026-09-15 03:05 UTCEPSS rescoreEPSS 68% · 99th percentile
  15. 2026-09-13 16:42 UTCEPSS rescoreEPSS 68% · 99th percentile
  16. 2026-09-12 14:55 UTCEPSS rescoreEPSS 68% · 99th percentile
  17. 2026-09-11 09:31 UTCEPSS rescoreEPSS 68% · 99th percentile
  18. 2026-09-10 09:26 UTCEPSS rescoreEPSS 68% · 99th percentile
  19. 2026-09-04 05:01 UTCEPSS rescoreEPSS 68% · 99th percentile
  20. 2026-09-02 14:07 UTCEPSS rescoreEPSS 68% · 99th percentile
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  22. 2026-08-30 19:13 UTCEPSS rescoreEPSS 68% · 99th percentile
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  24. 2026-08-26 14:41 UTCEPSS rescoreEPSS 68% · 99th percentile
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  1. 2026-08-21 23:44 UTCEPSS rescoreEPSS 68% · 99th percentile
  2. 2026-08-19 16:59 UTCEPSS rescoreEPSS 68% · 99th percentile
  3. 2026-08-17 13:42 UTCEPSS rescoreEPSS 68% · 99th percentile
  4. 2026-08-16 02:10 UTCEPSS rescoreEPSS 68% · 99th percentile
  5. 2026-08-15 01:26 UTCEPSS rescoreEPSS 68% · 99th percentile
  6. 2026-08-13 21:56 UTCEPSS rescoreEPSS 68% · 99th percentile
  7. 2026-08-09 13:42 UTCEPSS rescoreEPSS 68% · 99th percentile
  8. 2026-08-08 16:32 UTCEPSS rescoreEPSS 68% · 99th percentile
  9. 2026-08-07 16:22 UTCEPSS rescoreEPSS 68% · 99th percentile
  10. 2026-08-06 13:42 UTCEPSS rescoreEPSS 68% · 99th percentile
  11. 2026-08-05 19:12 UTCEPSS rescoreEPSS 68% · 99th percentile
  12. 2026-07-30 16:24 UTCEPSS rescoreEPSS 68% · 99th percentile
  13. 2026-07-30 01:26 UTCEPSS rescoreEPSS 68% · 99th percentile
  14. 2026-07-28 15:32 UTCEPSS rescoreEPSS 68% · 99th percentile
  15. 2026-07-26 14:51 UTCEPSS rescoreEPSS 68% · 99th percentile
  16. 2026-07-25 14:13 UTCEPSS rescoreEPSS 68% · 99th percentile
  17. 2026-07-23 14:15 UTCEPSS rescoreEPSS 68% · 99th percentile
  18. 2026-07-23 01:26 UTCEG score recompute
  19. 2026-07-22 22:05 UTCEG score recompute
  20. 2026-07-22 14:04 UTCEPSS rescoreEPSS 68% · 99th percentile
  21. 2026-07-21 15:21 UTCEPSS rescoreEPSS 68% · 99th percentile
  22. 2026-07-20 17:04 UTCEPSS rescoreEPSS 68% · 99th percentile
  23. 2026-07-19 14:28 UTCEPSS rescoreEPSS 68% · 99th percentile
  24. 2026-07-18 10:00 UTCEPSS rescoreEPSS 68% · 99th percentile
  25. 2026-07-15 16:54 UTCEPSS rescoreEPSS 68% · 99th percentile
  26. 2026-07-15 01:56 UTCEPSS rescoreEPSS 68% · 99th percentile
  27. 2026-07-13 06:09 UTCEPSS rescoreEPSS 68% · 99th percentile
  28. 2026-07-11 08:24 UTCEPSS rescoreEPSS 68% · 99th percentile
  29. 2026-07-09 19:06 UTCEPSS rescoreEPSS 68% · 99th percentile
  30. 2026-07-06 16:24 UTCEPSS rescoreEPSS 68% · 99th percentile
  31. 2026-07-06 02:20 UTCEPSS rescoreEPSS 68% · 99th percentile
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  33. 2026-07-01 15:02 UTCEPSS rescoreEPSS 68% · 99th percentile
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  36. 2026-06-28 04:53 UTCEPSS rescoreEPSS 68% · 99th percentile
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  38. 2026-06-25 13:47 UTCEPSS rescoreEPSS 68% · 99th percentile
  39. 2026-06-24 14:02 UTCEPSS rescoreEPSS 68% · 99th percentile
  40. 2026-06-23 21:30 UTCEPSS rescoreEPSS 68% · 99th percentile
  41. 2026-06-18 17:50 UTCEPSS rescoreEPSS 68% · 99th percentile
  42. 2026-06-17 17:50 UTCEPSS rescoreEPSS 68% · 99th percentile
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  45. 2026-06-13 22:57 UTCEPSS rescoreEPSS 76% · 98th percentile
  46. 2026-06-12 23:09 UTCEPSS rescoreEPSS 76% · 98th percentile
  47. 2026-06-11 13:57 UTCEPSS rescoreEPSS 76% · 98th percentile
  48. 2026-06-10 22:15 UTCEPSS rescoreEPSS 76% · 98th percentile
  49. 2026-06-08 14:14 UTCEPSS rescoreEPSS 76% · 98th percentile
  50. 2026-06-07 15:22 UTCEPSS rescoreEPSS 76% · 98th percentile
  51. 2026-06-06 13:45 UTCEPSS rescoreEPSS 76% · 98th percentile
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  56. 2026-05-31 00:14 UTCEPSS rescoreEPSS 76% · 98th percentile
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  60. 2026-05-26 07:17 UTCEPSS rescoreEPSS 76% · 98th percentile

Publicly available exploits

(3 references)

Public exploit code is referenced for this CVE (1 Metasploit module, 2 Exploit-DB entries). No fix is on record, so defenders should restrict or isolate affected systems accordingly.

  • Metasploitexploit/linux/misc/ueb9_bpserverd✓ verified
    Published Dec 8, 2017

    Unitrends UEB bpserverd authentication bypass RCE

    Open source ↗
  • Exploit-DBEDB-43031✓ verified
    Published Oct 23, 2017

    Unitrends UEB 9 - bpserverd Authentication Bypass Remote Command Execution (Metasploit)

    Open source ↗
  • Exploit-DBEDB-42957✓ verified
    Published Aug 8, 2017

    Unitrends UEB 9.1 - 'Unitrends bpserverd' Remote Command Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2017-12477?
CVE-2017-12477 is a critical-severity vulnerability; its CVE record was published on August 7, 2017. It was discovered that the bpserverd proprietary protocol in Unitrends Backup (UB) before 10.0.0, as invoked through xinetd, has an issue in which its authentication can be bypassed. A remote attacker could use this issue to execute arbitrary commands with root privilege on the target system.
When was CVE-2017-12477 made public?
CVE-2017-12477 was made public on August 7, 2017: that is the date its CVE record's CNA, MITRE Corporation, gives for when the vulnerability was made public. The CVE record itself was published on August 7, 2017. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2017-12477 actively exploited?
CVE-2017-12477 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: a Metasploit module exists for it, and Exploit-DB marks a public exploit for it as verified. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 68% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-12477?
CVE-2017-12477 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-12477?
No fix for CVE-2017-12477 has been recorded since its CVE record was published in 2017, and EchelonGraph holds no vendor advisory for it. Isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

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