CVE-2021-1234 | Cisco SD-WAN vManage Information Disclosure Vulnerabilities

A vulnerability in the cluster management interface of Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. To be affected by this vulnerability, the vManage software must be in cluster mode. This vulnerability is due to the absence of authentication for sensitive information in the cluster management interface. An attacker could exploit this vulnerability by sending a crafted request to the cluster management interface of an affected system. A successful exploit could allow the attacker to view sensitive information on the affected system.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Published: 2024-11-18 Last update: 2025-08-04 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-1234 is rated Low Risk (39.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.29%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-1234

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-30 0.21% 0.29% +0.08%
2 2026-05-19 0.29% 0.21% -0.07%
3 2026-04-25 — 0.29% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1234

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2021-1234

Affected software / configurations for CVE-2021-1234

Vendor Product Version Raw CPE
cisco catalyst_sd-wan_manager 17.2.4 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.4:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 17.2.5 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.5:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 17.2.6 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.6:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 17.2.7 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.7:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 17.2.8 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.8:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 17.2.9 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.9:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 17.2.10 cpe:2.3:a:cisco:catalyst_sd-wan_manager:17.2.10:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.2.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.2.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.1.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.1.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.3 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.3:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.3.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.3.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.4 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.4:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.5 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.5:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.6 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.6:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.6.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.6.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.7 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.7:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.3.8 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.3.8:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.0.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.0.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.3 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.3:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.4 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.4:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.5 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.5:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.6 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.6:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.302 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.302:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.303 cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.303:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 18.4.501_es cpe:2.3:a:cisco:catalyst_sd-wan_manager:18.4.501_es:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.0.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.0.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.0.1a cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.0.1a:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.1.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.1.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.2 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.2:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.3 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.3:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.31 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.31:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.32 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.32:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.097 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.097:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.098 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.098:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.099 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.099:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.2.929 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.2.929:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 19.3.0 cpe:2.3:a:cisco:catalyst_sd-wan_manager:19.3.0:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 20.1.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.1.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 20.1.1.1 cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.1.1.1:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 20.1.2 cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.1.2:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 20.1.2_937 cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.1.2_937:*:*:*:*:*:*:*
cisco catalyst_sd-wan_manager 20.1.12 cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.1.12:*:*:*:*:*:*:*

References for CVE-2021-1234

cvelogic Threat Intelligence