CVE-2021-3956

MEDIUM

5.3

CVSS Score

Published: May 18, 2022 at 04:10 PM UTC

Updated: June 17, 2026 at 04:06 AM UTC

46 products affected across 1 vendorXClarity ControllerThinkAgile HX3375ThinkAgile HX3376

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.8%

Description

A read-only authentication bypass vulnerability was reported in the Third Quarter 2021 release of Lenovo XClarity Controller (XCC) firmware affecting XCC devices configured in LDAP Authentication Only Mode and using an LDAP server that supports “unauthenticated bind”, such as Microsoft Active Directory. An unauthenticated user can gain read-only access to XCC in such a configuration, thereby allowing the XCC device configuration to be viewed but not changed. XCC devices configured to use local authentication, LDAP Authentication + Authorization Mode, or LDAP servers that support only “authenticated bind” and/or “anonymous bind” are not affected.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

XClarity Controller · Lenovo

95%

v < 1.51_tgbt24lv < 2.32_psi342nv < 3.41_tei382mv < 4.83_tei3c0nv < 7.22_cdi382ovarious Third Quarter 2021 releases

Affected range stops below 1.51_tgbt24l, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.32_psi342n, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.41_tei382m, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.83_tei3c0n, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.22_cdi382o, so it looks safe — our inference, not a vendor statement

lenovo-thinkagile-hx1320 (environment) · lenovo-thinkagile-hx1321 (environment) · lenovo-thinkagile-hx1520-r (environment) · lenovo-thinkagile-hx1521-r (environment) · lenovo-thinkagile-hx2320-e (environment) · lenovo-thinkagile-hx2321 (environment) · lenovo-thinkagile-hx3320 (environment) · lenovo-thinkagile-hx3321 (environment) · lenovo-thinkagile-hx3375 (environment) · lenovo-thinkagile-hx3376 (environment) · lenovo-thinkagile-hx3520-g (environment) · lenovo-thinkagile-hx3521-g (environment) · lenovo-thinkagile-hx5520 (environment) · lenovo-thinkagile-hx5520-c (environment) · lenovo-thinkagile-hx5521 (environment) · lenovo-thinkagile-hx5521-c (environment) · lenovo-thinkagile-hx7520 (environment) · lenovo-thinkagile-hx7521 (environment) · lenovo-thinkagile-hx7820 (environment) · lenovo-thinkagile-hx7821 (environment) · lenovo-thinkagile-mx1021 (environment) · lenovo-thinkagile-vx2320 (environment) · lenovo-thinkagile-vx3320 (environment) · lenovo-thinkagile-vx3520-g (environment) · lenovo-thinkagile-vx5520 (environment) · lenovo-thinkagile-vx7320-n (environment) · lenovo-thinkagile-vx7520 (environment) · lenovo-thinkagile-vx7520-n (environment) · lenovo-thinkstation-p920 (environment) · lenovo-thinksystem-sd650 (environment) · lenovo-thinksystem-se350 (environment) · lenovo-thinksystem-sn550 (environment) · lenovo-thinksystem-sn850 (environment) · lenovo-thinksystem-sr530 (environment) · lenovo-thinksystem-sr550 (environment) · lenovo-thinksystem-sr570 (environment) · lenovo-thinksystem-sr590 (environment) · lenovo-thinksystem-sr630 (environment) · lenovo-thinksystem-sr645 (environment) · lenovo-thinksystem-sr650 (environment) · lenovo-thinksystem-sr665 (environment) · lenovo-thinksystem-sr850 (environment) · lenovo-thinksystem-sr860 (environment) · lenovo-thinksystem-sr950 (environment) · lenovo-thinksystem-st550 (environment)

ThinkAgile HX1320 · Lenovodevice

80%

All versions

ThinkAgile HX1321 · Lenovodevice

80%

All versions

ThinkAgile HX1520-R · Lenovodevice

80%

All versions

ThinkAgile HX1521-R · Lenovodevice

80%

All versions