Cybersecurity · 71 views
Attackers exploit Cisco Unified CM flaw weeks after patch release
A critical Cisco Unified CM vulnerability is now under active exploitation, weeks after the company issued patches warning it could allow attackers to gain root access. Threat intelligence firm Defused reported the exploitation on June 23.
AI Summary
A critical vulnerability in Cisco Unified CM, CVE‑2026‑20230, is now actively exploited. Defused reported the activity on June 23 after observing it over the weekend, noting that a single source was using an unvetted proof‑of‑concept with file:// file‑write payloads that landed on decoys. Cisco issued patches on June 3, stating at that time it had no evidence of malicious use. The flaw stems from improper input validation for specific HTTP requests and could let an unauthenticated, remote attacker perform server‑side request forgery (SSRF) attacks. The CVSS base score for the vulnerability is 8.6.
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