- Published
- Source
- CSO Online UK
- Filed under
- UK industry, Malware & exploits
- Vulnerabilities
- 1 CVE
SonicWall has disclosed yet another critical flaw in one of its core products. CVE-2026-102255, rated 10 in severity, the highest possible on the Common Vulnerability Scoring System (CVSS), is a pre-authentication server-side request forgery (SSRF) vulnerability in the SMA1000 Appliance Work Place interface. An unintended access path could allow attackers to order the appliance to…
If you run the affected product
- Find every instance – especially the ones reachable from the internet.
- Apply the vendor's patch or mitigation now: exploited flaws are fixed in days, not at the next patch cycle.
- Then check for signs it was used before you patched: web shells, new accounts, unusual outbound traffic.
More helpCISA's Known Exploited Vulnerabilities catalogue (opens in a new tab)
The vulnerabilities in this story
CVE-2026-102255 in the NVD (opens in a new tab)
- CVSS10.0Critical
- CISA KEVNot listedno confirmed exploitation on CISA’s list (yet)
Exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog (CC0). Exploit prediction: EPSS by FIRST. This product uses the NVD API but is not endorsed or certified by the NVD.
Defender’s notebook
The attacker technique behind this story, in MITRE’s terms – and what to check in your own estate.
Exploit Public-Facing Application
Initial AccessWhat a defender checks
- Find every internet-facing instance of the affected product.
- Patch, or apply the vendor's mitigation now – CISA's KEV list gives a deadline.
- Look for signs it was exploited before you patched: web shells, new accounts, odd outbound traffic.
Build the skillBlue Team Analyst · Vulnerability Management
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