Low

RCE in Cisco Adaptive Security Appliance (ASA) with VPN credentials

IdentifiersCVE-2025-30333CWE-287

CVE-2025-30333 is a Cisco Adaptive Security Appliance (ASA) vulnerability reported with a CVSS score of 9.9. Based on the provided content, the issue allows an attacker who possesses valid VPN credentials to execute code on the ASA device. Reporting indicates it has been exploited in the wild in combination with CVE-2025-20362 against internet-exposed Cisco ASA firewalls used by governments and large enterprises. The supplied material does not identify the specific vulnerable component, function, or root-cause class, so a more precise technical description is currently not available.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation of CVE-2025-30333 allows code execution on the Cisco ASA appliance by an attacker with VPN credentials. In observed campaigns, it was reportedly chained with CVE-2025-20362 to obtain deep and persistent control of affected devices, including maintaining access across reboots and system upgrades. Because ASA devices commonly serve as security gateways and VPN concentrators, compromise can expose a high-value network edge position and enable broader follow-on intrusion activity.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, treat exposed Cisco ASA devices as high risk, especially those reachable from the internet and used for VPN access. The provided reporting recommends assuming compromise, performing full credential hygiene, and reviewing logs for signs of exploitation. In suspected-compromise scenarios, factory reset the appliance and rotate all secrets, including passwords, cryptographic keys, and certificates, before returning the device to service.

Remediation

Patch, then assume compromise.

Apply Cisco-provided patches for CVE-2025-30333 immediately. The content states that CISA issued an emergency directive requiring U.S. federal civilian agencies to patch this issue. Where compromise is suspected, the provided reporting recommends more than patching alone: reset affected devices to factory defaults and rotate all passwords, keys, and certificates before reconfiguration, because attackers were reportedly able to maintain persistent access.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

13 SOURCESView more in app

hackreadNews

Nov 4, 2025

China-Linked Hackers Target Cisco Firewalls in Global Campaign

A high-severity Cisco ASA vulnerability that allows an attacker with VPN credentials to execute arbitrary code on the device, and is reportedly being chained with another flaw for persistent compromise.

risky biz rssNews

Oct 16, 2025

Risky Bulletin: F5 says an APT stole source code, vulnerability reports

A Cisco zero-day vulnerability referenced in connection with suspected Chinese state-sponsored exploitation (specific technical details not provided in the content).

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence1

Every observed campaign linking this CVE to a named adversary.

Associated malware2

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity11