CVE-2021-1515: Cisco SD-WAN vManage Information Disclosure Vulnerability
Telemetry drift only. No threshold crossed and no authority ruling changed.
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
- Upgrade to sd-wan vmanage 20.4.1 or later upper bounds of the CVE record's affected ranges
- 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 Cisco SD-WAN vManage Software could allow an unauthenticated, adjacent attacker to gain access to sensitive information. This vulnerability is due to improper access controls on API endpoints when Cisco SD-WAN vManage Software is running in multi-tenant mode. An attacker with access to a device that is managed in the multi-tenant environment could exploit this vulnerability by sending a request to an affected API endpoint on the vManage system. A successful exploit could allow the attacker to gain access to sensitive information that may include hashed credentials that could be used in future attacks.
- weakness
- CWE-284
- affected
- Cisco SD-WAN vManage
- published ranges
- cisco sd-wan vmanage < 20.4.1
- first unaffected version, by branch
- sd-wan vmanage 20.4.1
- severity
- 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- assigned by
- cisco
- published
- 2021-05-06
check us tools.cisco.com
Exploit code held, dated
- exploit code
- None held in the PoC-in-GitHub feed. A public repository changes this brief.
What moved held, dated
| date | EPSS | event |
|---|---|---|
| 7 May 2021 | 0.00416 | |
| 6 Jan 2022 | 0.0184 | |
| 4 Feb 2022 | 0.01404 | |
| 1 Apr 2022 | 0.00885 | |
| 7 Mar 2023 | 0.0005 | scoring model v2023.03.01 |
| 8 Mar 2023 | 0.0005 | |
| 11 Dec 2023 | 0.00051 | |
| 20 Jan 2024 | 0.00058 | |
| 19 Mar 2025 | 0.00064 | scoring model v2025.03.14 |
| 29 Mar 2025 | 0.00087 | |
| 30 Mar 2025 | 0.00064 | |
| 18 Nov 2025 | 0.00071 | |
| 21 Nov 2025 | 0.00064 | |
| 15 Jun 2026 | 0.00367 | scoring model v2026.06.15 |
14 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
- 0.00 on 2026-06-15 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
- fix
- Held: sd-wan vmanage 20.4.1. A newer fix from 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-2021-1515', '2026-10-31T23:59:59.999999Z', now());