CVE-2021-1599Network attack vector

Unauthenticated browser code execution via unvalidated parameter

Published Jul 22, 2021 · Updated Nov 7, 2024

Cross-site scripting in Cisco Unified Customer Voice Portal 12.5(1) and earlier allows remote attackers to execute browser code. The web-based management interface uses an insufficiently validated request parameter in generated content, so a crafted link injects script into the targeted user's interface. Exploitation requires the targeted user to open the link; injected code accesses browser-based information, and an administrative session also exposes the device to reboot.

CVSS severity6.1
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Cisco Unified Customer Voice Portal 12.5(1) and earlier allows remote attackers to execute browser code. The web-based management interface uses an insufficiently validated request parameter in generated content, so a crafted link injects script into the targeted user's interface. Exploitation requires the targeted user to open the link; injected code accesses browser-based information, and an administrative session also exposes the device to reboot.

The record

CVE
CVE-2021-1599
Published
Jul 22, 2021
Updated
Nov 7, 2024
Vendor
ClamAV
Product
Cisco Unified Customer Voice Portal
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Customer Voice Portalversion=n/a

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.1CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:X/RL:X/RC:X
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4Cisco Systems, Inc. CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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