CVE-2017-20221

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 21.4% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-16 01:28Z7 MO AGO

Last updated

2026-04-07 14:03Z6 MO AGO

Reserved

2026-03-15

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

Weaknesses

• CWE-352Cross-Site Request Forgery (CSRF)Compound

Data version

5.2

Document digest

351205eb20e1d5c2ee5956f7ae3bb4f25ebaf4108a06ba4693545e48925b1f62

• www.zeroscience.mkZero Science Lab Disclosurehttps://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5443.phpthird-party-advisory
• cxsecurity.comCXSecurityhttps://cxsecurity.com/issue/WLB-2017120299third-party-advisory
• packetstormsecurity.comPacket Storm Securityhttps://packetstormsecurity.com/files/145550exploit
• www.exploit-db.comExploit DBhttps://www.exploit-db.com/exploits/43400/exploit
• exchange.xforce.ibmcloud.comIBM X-Force Exchangehttps://exchange.xforce.ibmcloud.com/vulnerabilities/136839vdb-entry
• www.vulncheck.comVulnCheck Advisory: Telesquare SKT LTE Router SDT-CS3B1 CSRF System Command Executionhttps://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-csrf-system-command-executionthird-party-advisory