Medium

CVE-2026-20210 — Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to modify configurations and perform unauthorized actions on an affected system. This vulnerability exists because of a failure to redact sensitive information within device configurations and templates. An attacker could exploit this vulnerability by elevating their read-only permissions to those of a high-privileged user. A successful exploit could allow the attacker to access or modify configuration settings within Cisco Catalyst SD-WAN Manager as a high-privileged user.

Published May 14, 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 0.2% (30-day exploitation probability)+1
Technical severity (medium)+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

0.19%

ahead of 9% of scored CVEs · Oct 14, 2026

Affects

Cisco

Catalyst Sd-wan Manager

CVSS base

5.4

Medium · 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

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 Catalyst Sd-wan Manager).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Cisco	Catalyst Sd-wan Manager	version 20.9.8.2_LI_Imagesversion 20.9.8.2version 20.18.3version 20.18.3_LI_Imagesversion 20.15.5version 20.15.5_LI_Imagesversion 20.12.7version 20.12.7_LI_Images and 284 more version 20.9.9version 20.9.9_LI_Imagesversion 20.18.2.2version 20.18.2.2_LI_Imagesversion 20.1.12version 19.2.1version 18.4.4version 18.4.5version 20.1.1.1version 20.1.1version 19.3.0version 19.2.2version 19.2.099version 18.3.6version 18.3.7version 19.2.0version 18.3.8version 19.0.0version 19.1.0version 18.4.302version 18.4.303version 19.2.097version 19.2.098version 17.2.10version 18.3.6.1version 19.0.1aversion 18.2.0version 18.4.3version 18.4.1version 17.2.8version 18.3.3.1version 18.4.0version 18.3.1version 17.2.6version 17.2.9version 18.3.4version 17.2.5version 18.3.1.1version 18.3.5version 18.4.0.1version 18.3.3version 17.2.7version 17.2.4version 18.3.0version 19.2.3version 18.4.501_ESversion 20.3.1version 20.1.2version 19.2.929version 19.2.31version 20.3.2version 19.2.32version 20.3.2_925version 20.3.2.1version 20.3.2.1_927version 18.4.6version 20.1.2_937version 20.4.1version 20.3.2_928version 20.3.2_929version 20.4.1.0.1version 20.3.2.1_930version 19.2.4version 20.5.0.1.1version 20.4.1.1version 20.3.3version 19.2.4.0.1version 20.3.2_937version 20.3.3.1version 20.5.1version 20.1.3version 20.3.3.0.4version 20.3.3.1.2version 20.3.3.1.1version 20.4.1.2version 20.3.3.0.2version 20.4.1.1.5version 20.4.1.0.01version 20.4.1.0.02version 20.3.3.1.7version 20.3.3.1.5version 20.5.1.0.1version 20.3.3.1.10version 20.3.3.0.8version 20.4.2version 20.4.2.0.1version 20.3.4version 20.3.3.0.14version 19.2.4.0.8version 19.2.4.0.9version 20.3.4.0.1version 20.3.2.0.5version 20.6.1version 20.5.1.0.2version 20.3.3.0.17version 20.6.1.1version 20.6.0.18.3version 20.3.2.0.6version 20.6.0.18.4version 20.4.2.0.2version 20.3.3.0.16version 20.3.4.0.5version 20.6.1.0.1version 20.3.4.0.6version 20.6.2version 20.7.1EFT2version 20.3.4.0.9version 20.3.4.0.11version 20.4.2.0.4version 20.3.3.0.18version 20.7.1version 20.6.2.1version 20.3.4.1version 20.5.1.1version 20.4.2.1version 20.4.2.1.1version 20.3.4.1.1version 20.3.813version 20.3.4.0.19version 20.4.2.2.1version 20.5.1.2version 20.3.4.2version 20.3.814version 20.4.2.2version 20.6.2.2version 20.3.4.2.1version 20.7.1.1version 20.3.4.1.2version 20.6.2.2.2version 20.3.4.0.20version 20.6.2.2.3version 20.4.2.2.2version 20.3.5version 20.6.2.0.4version 20.4.2.2.3version 20.3.4.0.24version 20.6.2.2.7version 20.6.3version 20.3.4.2.2version 20.4.2.2.4version 20.7.1.0.2version 20.8.1version 20.3.5.0.8version 20.3.5.0.9version 20.4.2.2.8version 20.3.5.0.7version 20.6.3.0.7version 20.6.3.0.5version 20.6.3.0.10version 20.6.3.0.2version 20.7.2version 20.9.1EFT2version 20.6.3.0.11version 20.6.3.1version 20.6.3.0.14version 20.6.4version 20.9.1version 20.6.3.0.19version 20.6.3.0.18version 20.3.6version 20.9.1.1version 20.6.3.0.23version 20.6.4.0.4version 20.6.3.0.25version 20.6.5version 20.6.3.0.27version 20.9.2version 20.9.2.1version 20.6.3.0.29version 20.6.3.0.31version 20.6.3.0.32version 20.10.1version 20.6.3.0.33version 20.9.2.0.01version 20.9.1_LI_Imagesversion 20.10.1_LI_Imagesversion 20.9.2_LI_Imagesversion 20.3.7version 20.9.3version 20.6.5.1version 20.11.1version 20.11.1_LI_Imagesversion 20.9.3_LI_ Imagesversion 20.6.3.1.1version 20.9.3.0.2version 20.6.5.1.2version 20.9.3.0.3version 20.4.2.3version 20.6.3.2version 20.6.4.1version 20.6.3.0.38version 20.6.3.0.39version 20.3.5.1version 20.3.4.3version 20.9.3.1version 20.3.3.2version 20.6.5.2version 20.3.7.1version 20.10.1.1version 20.6.5.2.1version 20.3.4.0.25version 20.6.2.2.4version 20.6.1.2version 20.11.1.1version 20.9.3.0.5version 20.3.4.0.26version 20.6.5.1.3version 20.6.3.0.40version 20.1.3.1version 20.9.2.2version 20.6.5.2.3version 20.6.5.1.4version 20.6.5.3version 20.6.3.0.41version 20.9.3.0.7version 20.6.5.1.5version 20.9.3.0.4version 20.6.4.0.19version 20.6.5.1.6version 20.9.3.0.8version 20.6.3.3version 20.3.7.2version 20.6.5.4version 20.6.5.1.7version 20.9.3.0.12version 20.6.4.2version 20.6.5.5version 20.9.3.2version 20.11.1.2version 20.6.3.4version 20.10.1.2version 20.6.5.1.9version 20.9.3.0.16version 20.6.3.0.45version 20.6.5.1.10version 20.9.3.0.17version 20.6.5.2.4version 20.6.4.0.21version 20.9.3.0.18version 20.6.3.0.46version 20.6.3.0.47version 20.9.2.3version 20.9.3.2_LI_Imagesversion 20.9.3.0.21version 20.9.3.0.20version 20.9.4_LI_Imagesversion 20.9.4version 20.6.5.1.11version 20.12.1version 20.12.1_LI_Imagesversion 20.6.5.1.13version 20.9.3.0.23version 20.6.5.2.8version 20.9.4.1version 20.9.4.1_LI_Imagesversion 20.9.3.0.25version 20.9.3.0.24version 20.6.5.1.14version 20.3.8version 20.6.6version 20.9.3.0.26version 20.6.3.0.51version 20.9.3.0.29version 20.12.2version 20.12.2_LI_Imagesversion 20.6.6.0.1version 20.13.1_LI_Imagesversion 20.9.4.0.4version 20.13.1version 20.9.4.1.1version 20.9.5version 20.9.5_LI_Imagesversion 20.12.3_LI_Imagesversion 20.12.3version 20.9.4.1.3version 20.6.7version 20.9.5.1version 20.9.5.1_LI_Imagesversion 20.9.4.1.6version 20.14.1version 20.14.1_LI_Imagesversion 20.9.5.2version 20.9.5.2.1version 20.9.5.2_LI_Images	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Catalyst Sd-wan Manager	< 20.9.9.1≥ 20.10 and < 20.12.5.4≥ 20.12.6 and < 20.12.6.2≥ 20.13 and < 20.15.4.4≥ 20.15.5 and < 20.15.5.2≥ 20.16 and < 20.18.2.2≥ 26.1 and < 26.1.1.1version 20.12.7	Vulnerable	NIST National Vulnerability Database

Attack characteristics

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

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

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
5.4	CVSS 3.1	Medium	2.8	2.5	psirt@cisco.com via NIST National Vulnerability Database
5.4	CVSS 3.1	Medium	—	—	cisco via CVE Program (cve.org) e CISA ADP

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

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-779

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.19%

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

Timeline

What happened to this CVE, newest first.

2026
Affected products added · cisco/cisco catalyst sd-wan manager
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 · 5.4
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
May 14, 2026 · cisco

Source activity

Repeated readings are counted rather than listed.

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

References

2 on the record

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-mltvnps2
Vendor Advisory, NIST National Vulnerability Database
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHch
Not Applicable, NIST National Vulnerability Database

Elsewhere on this site

Cisco
every CVE for this vendor

CWE-779
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-76504 Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability KEV 15d
Medium CVE-2026-20262 Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability KEV Jun 15, 2026
High CVE-2026-20245 Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output Vulnerability KEV Jun 4, 2026
High CVE-2026-20224 Cisco Catalyst SD-WAN Manager XML External Entity Injection Vulnerability May 14, 2026
Critical CVE-2026-20182 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEV May 14, 2026
Medium CVE-2026-20209 Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability May 14, 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-2026-20210 is "Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability", rated Medium. It affects Catalyst Sd-wan Manager (Cisco); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.4 describes technical severity. EPSS 0.19% 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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