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CVE-2026-127090VulnerabilityPublished

Jadaptive Maverick Synergy Server before 3.0.33 and 3.1.x before 3.1.7, and Maverick Legacy Server before 1.8.1

Source GCVE Database

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Authoritative record:CVE-2026-127090· High 8.7

Not known to be exploited · CVSS 8.7 High : upgrade to 3.1.7 or 3.0.33 soon.

Data as of 13 Nov 2026, 13:46 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.08.7
CNA (VulnCheck)CVSS 3.18.8
Patch
Available – fixed in 3.1.7, 3.0.33, 1.8.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade Maverick to 3.1.7 or 3.0.33 (Synergy Server); 1.8.1 (Legacy Server).

Affected software

ProductAffectedFixed in
JadaptiveMaverick Synergy ServerAffected
  • >=3.1.0 <3.1.7
Fixed in
  • 3.1.7
JadaptiveMaverick Synergy ServerAffected
  • <3.0.33
Fixed in
  • 3.0.33
JadaptiveMaverick Legacy ServerAffected
  • <1.8.1
Fixed in
  • 1.8.1
MavenMaverick Synergy Serverpkg:maven/Maverick Synergy ServerOther threatsAffected
  • <3.0.33
  • >=3.1.0 <3.1.7
Fixed in
  • 3.0.33
  • 3.1.7

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict SSH key usage and monitor for unusual authentication behavior. Avoid sharing SSH keys across multiple accounts and consider disabling public key authentication if feasible as a temporary mitigation.

Description

Jadaptive Maverick Synergy Server versions before 3.0.33 and 3.1.x before 3.1.7, as well as Maverick Legacy Server before 1.8.1, have an authentication bypass vulnerability in SSH public key authentication. This flaw allows attackers with a key authorized for one account to authenticate and then switch usernames on the same connection to gain access to other accounts without proper authorization.

References

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