Critical Input validation

CVE-2026-20093 — Cisco IMC Authentication Bypass in Change Password Function (CVE-2026-20093)

A vulnerability in the change password functionality of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to bypass authentication and gain access to the system as Admin. This vulnerability is due to incorrect handling of password change requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to bypass authentication, alter the passwords of any user on the system, including an Admin user, and gain access to the system as that user.

Published Apr 1, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: cisco

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 1% (30-day exploitation probability)+9
Technical severity (critical)+10
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.99%

ahead of 62% of scored CVEs · Oct 15, 2026

Affects

Cisco

Cisco Unified Computing System (Standalone) and 2 more

CVSS base

9.8

Critical · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Cisco Cisco Unified Computing System (Standalone), Cisco Cisco Unified Computing System E-Series Software (UCSE), Cisco Enterprise Nfv Infrastructure Software).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (input validation), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Cisco	Cisco Unified Computing System (Standalone)	version 4.1(2b)version 4.0(2o)version 4.0(4m)version 4.1(2d)version 4.1(3b)version 4.0(2p)version 4.1(2e)version 4.1(2f) and 133 more version 4.0(4n)version 4.0(2q)version 4.1(3c)version 4.0(2r)version 4.1(3d)version 4.1(2g)version 4.1(2h)version 4.1(3f)version 4.1(2j)version 4.1(2k)version 4.1(3h)version 4.2(2a)version 4.1(3i)version 4.2(2f)version 4.2(2g)version 4.2(3b)version 4.1(3l)version 4.2(3d)version 4.3(1.230097)version 4.2(1e)version 4.2(1b)version 4.2(1j)version 4.2(1i)version 4.2(1f)version 4.2(1a)version 4.2(1c)version 4.2(1g)version 4.3(1.230124)version 4.1(2l)version 4.2(3e)version 4.3(1.230138)version 4.2(3g)version 4.3(2.230207)version 4.2(3h)version 4.2(3i)version 4.3(2.230270)version 4.1(3m)version 4.1(2m)version 4.3(2.240002)version 4.3(3.240022)version 4.2(3j)version 4.1(3n)version 4.3(2.240009)version 4.3(3.240043)version 4.3(4.240142)version 4.3(2.240037)version 4.3(2.240053)version 4.3(4.240152)version 4.2(3l)version 4.3(2.240077)version 4.3(4.242028)version 4.3(4.241063)version 4.3(4.242038)version 4.2(3m)version 4.3(2.240090)version 4.3(5.240021)version 4.3(2.240107)version 4.3(4.242066)version 4.2(3n)version 4.3(5.250001)version 4.2(3o)version 4.3(2.250016)version 4.3(2.250021)version 4.3(5.250030)version 4.3(2.250022)version 4.3(6.250040)version 4.3(5.250033)version 4.3(6.250044)version 4.3(6.250053)version 4.3(2.250037)version 4.3(2.250045)version 4.3(4.252001)version 4.3(4.252002)version 6.0(1.250127)version 4.2(3p)version 6.0(1.250131)version 4.3(6.250101)version 4.3(6.250117)version 4.3(5.250043)version 4.3(6.250039)version 4.3(5.250045)version 4.3(6.250060)version 6.0(1.250130)version 4.3(4.241014)version 4.3(2.250063)version 4.3(6.260003)version 4.0(2g)version 3.1(2i)version 3.1(1d)version 4.0(4i)version 4.1(1c)version 4.0(2c)version 4.0(1e)version 4.0(2h)version 4.0(4h)version 4.0(1h)version 4.0(2l)version 3.1(3g)version 4.0(1.240)version 4.0(2f)version 4.0(1g)version 4.0(2i)version 3.1(3i)version 4.0(4d)version 4.1(1d)version 3.1(3c)version 4.0(4k)version 3.1(2d)version 3.1(3a)version 3.1(3j)version 4.0(2d)version 4.1(1f)version 4.0(1c)version 4.0(4f)version 4.0(4c)version 3.1(3d)version 3.1(2g)version 3.1(2c)version 4.0(1d)version 3.1(2e)version 4.0(1a)version 4.0(1b)version 3.1(3b)version 4.0(4b)version 3.1(2b)version 4.0(4e)version 3.1(3h)version 4.0(4l)version 4.1(1g)version 4.1(2a)version 4.0(2n)version 4.1(1h)version 3.1(3k)	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Cisco Unified Computing System E-Series Software (UCSE)	version 3.2.7version 3.2.6version 3.2.4version 3.2.10version 3.2.2version 3.2.3version 2.4.0version 3.2.1 and 34 more version 3.2.11.1version 3.2.8version 3.1.1version 3.0.2version 2.1.0version 2.2.2version 3.1.2version 3.0.1version 2.3.2version 2.3.5version 2.2.1version 3.1.4version 2.4.1version 2.3.1version 3.2.14version 4.02version 4.15.2version 4.00version 3.2.16.1version 4.12.2version 3.2.15.3version 4.12.1version 3.2.15version 4.11.1version 3.1.3version 3.2.13.6version 3.2.12.2version 3.2.11.5version 3.2.11.3version 2.0.0version 3.1.0version 3.1.5version 2.4.2version 2.3.3	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Enterprise Nfv Infrastructure Software	version 4.1.1version 3.9.1version 3.5.2version 3.12.2version 3.6.2version 3.9.2version 3.11.3version 3.11.1 and 61 more version 3.5.1version 3.3.1version 3.10.2version 3.12.1bversion 3.4.1version 3.12.1aversion 3.6.3version 3.8.1version 3.11.2version 3.12.1version 3.12.3version 3.10.1version 3.6.1version 3.10.3version 3.7.1version 4.1.2version 4.2.1version 4.2.2version 4.4.1version 4.4.2version 4.5.1version 4.4.3version 4.6.1version 4.7.1version 4.6.2-FC2version 4.6.2-FC3version 4.6.2version 4.8.1version 4.8.2version 4.9.1version 4.6.3version 4.9.2-FC5version 4.9.2version 4.10.1version 4.9.3version 4.11.1version 4.9.4version 4.12.1version 4.6.4version 4.12.2version 4.13.1version 4.9.4-ES8version 4.9.5version 4.12.3version 4.6.5-ES1version 4.9.4-ES9version 4.14.1version 4.6.3-FC4version 4.9.4-FC3version 4.12.4version 4.15.1version 4.9.6version 4.16.1version 4.15.2version 4.12.5version 4.15.3version 4.15.4version 4.18.1version 4.12.6version 4.18.2version 4.18.2a	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
9.8	CVSS 3.1	Critical	3.9	5.9	psirt@cisco.com via NIST National Vulnerability Database
9.8	CVSS 3.1	Critical	—	—	cisco via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: psirt@cisco.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-20 · Improper Input Validation

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.99%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Analysis and videos

CVE-2026-20093: Cisco IMC Authentication Bypass in Change Password Function
CVE-2026-20093 is a critical authentication bypass in the change password functionality of Cisco Integrated Management Controller (IMC), rated 9.8 under CVSS 3.1 by the CNA. The record describes an unauthenticated remote attacker gaining Admin-level access by abusing incorrect handling of password change requests. The record shows no affected versions, fixed releases, or KEV listing, so the vendor advisory is the primary source for remediation.

Timeline

What happened to this CVE, newest first.

2026
Affected products added · cisco/cisco enterprise nfv infrastructure software, cisco/cisco unified computing system (standalone), cisco/cisco unifi
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 9.8
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Awaiting Analysis
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Apr 1, 2026 · cisco

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cimc-auth-bypa
NIST National Vulnerability Database

Elsewhere on this site

Cisco
every CVE for this vendor

Input validation
same class

CWE-20
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-20293 Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot Bypass Vulnerability Sep 8, 2026
Medium CVE-2026-20288 Cisco IMC Remote Code Execution Vulnerability Remote Code Execution Vulnerability Aug 5, 2026
High CVE-2026-20200 Cisco Integrated Management Controller Argument Injection and Remote Code Execution Vulnerability Aug 5, 2026
Medium CVE-2026-20198 Cisco Integrated Management Controller Cross-Site Scripting Vulnerability Aug 5, 2026
Medium CVE-2026-20097 Cisco Integrated Management Controller Remote Code Execution Vulnerability Apr 1, 2026
Medium CVE-2026-20096 Cisco Integrated Management Controller Command Injection Vulnerability Apr 1, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-20093 is "Cisco IMC Authentication Bypass in Change Password Function (CVE-2026-20093)", rated Critical. It affects Cisco Unified Computing System (Standalone) (Cisco); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.8 describes technical severity. EPSS 0.99% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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