CVE-2026-20200: Cisco Integrated Management Controller Argument Injection and Remote Code Execution Vulnerability
Description revised (poc_count, poc_public, poc_url). The record changed; nothing in the observed threat did.
CVE record, CISA KEV and EPSS as of 2026-10-18.
CVEs like this one computed, by meaning
What to do now held facts and links
- No fix version is held. The CNA's first reference is the place to look: sec.cloudapps.cisco.com
- Record your decision, dated and frozen with today's evidence: patch by a date · mitigated by a compensating control · deferred · accepted the risk · not affected
- Check your version against the ranges this record publishes.
What it is stated by the CNA
A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with low privileges to execute arbitrary commands on the underlying operating system of an affected system and elevate privileges to root. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by entering crafted inputs to the web-based management interface of the affected software. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system as the root user.
- weakness
- CWE-141 Improper Neutralization of Parameter/Argument Delimiters
- affected
- Cisco Unified Computing System (Standalone)
- published ranges
- cisco unified computing system 4.3\(1.230097\); cisco unified computing system 4.3\(1.230124\); cisco unified computing system 4.3\(1.230138\); cisco unified computing system 4.3\(2.230207\); and 34 more on the CVE page
- fixed in
- No fix version in held sources.
- severity
- 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- assigned by
- cisco
- published
- 2026-08-05
check us sec.cloudapps.cisco.com
Exploit code held, dated
- exploit code
- 1 public proof-of-concept repository, first seen 2026-07-21 (PoC-in-GitHub).
What moved held, dated
| date | EPSS | event |
|---|---|---|
| 6 Aug 2026 | 0.00843 | |
| 28 Aug 2026 | 0.05153 | |
| 1 Sep 2026 | 0.0571 | |
| 28 Sep 2026 | 0.00734 |
4 observations held. A step marked with a scoring model moved because the measurement was replaced, not because the vulnerability changed.
Outside the record researched, cited
This section reads the record's references and adds cited findings from outside it. It needs an account. Everything above is held facts and is complete without it.
What would change this brief held, dated
- CISA KEV
- Not listed in the catalogue we hold. A listing changes this brief.
- exploit probability
- 0.01 on 2026-09-28 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
- fix
- No fix version is held. One published by the CNA or OSV changes this brief.
How to check this
Every value above is held with two dates: when it was true upstream (as_of) and when we recorded it (tx_from). Re-derive the exploit probability as it stood on any date:
SELECT value, source, source_version, as_of, tx_from
FROM volatile_valid_as_of('CVE-2026-20200', '2026-10-30T23:59:59.999999Z', now());