The US Computer Emergency Readiness Team (US-CERT) has issued an alert to administrators following the release of four security patches from Cisco.
The patches cover Cisco's Unified IP phones, AnyConnect Secure Mobility Client, Network Registrar and Cisco Media Experience products.
US-CERT, which is part of the Department of Homeland Security's National Cyber Security Division, advised immediate patching.
"Exploitation of the vulnerabilities may allow an attacker to execute arbitrary code, operate with escalated privileges or gain administrative access," said the US-CERT security advisory.
Cisco has issued three patches for its 7900 series IP phone range, covering flaws that could allow an attacker to escalate network security privileges.
Three more patches for the AnyConnect VPN will block similar escalation problems and plug a security hole that could allow remote code execution by an attacker.
Cisco, along with many other core network providers, is stepping up its vulnerability and patching efforts.
The recent attacks on government, industry, the commercial sector and the internet network infrastructure have highlighted the need for a more rigorous regime.
"These kinds of efforts are a reflection of the increasing complexity of the security landscape that administrators face," Charles King, principal analyst at research firm Pund-IT, told V3.co.uk.
"Given the high-value target the typical CERT user represents to overseas and native hackers, vendors and customers need to be more aware of this."
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