Publicity administration firm WatchTowr experiences {that a} latest Cisco Catalyst SD-WAN vulnerability, initially exploited as a zero-day, is now getting used extra steadily by risk actors.
The in-the-wild exploitation of 4 Cisco Catalyst SD-WAN vulnerabilities got here to gentle in latest weeks. One in every of them is CVE-2026-20127, which had been exploited as a zero-day together with an older vulnerability, CVE-2022-20775, to bypass authentication, escalate privileges, and set up persistence on techniques.
Cisco Talos linked the assaults to UAT-8616, a extremely refined risk actor of unspecified origin and motivation that has been energetic since at the very least 2023.
WatchTowr’s head of proactive risk intelligence, Ryan Dewhurst, advised SecurityWeek that the tempo of exploitation for CVE-2026-20127 has — unsurprisingly — escalated rapidly.
“That is now not focused exercise that was described beforehand, however now internet-wide and rising,” Dewhurst mentioned.
“In complete, the watchTowr proactive risk intelligence crew has seen exploitation makes an attempt from quite a few distinctive IP addresses and noticed risk actors deploying webshells,” he defined. “The biggest spike in exercise occurred on March 4, with assaults broadly unfold throughout varied areas worldwide, and U.S.-based areas noticed barely larger exercise than others.”
The professional warned, “We anticipate exercise to proceed as a part of the standard lengthy tail of exploitation, as extra risk actors grow to be concerned,” including, “With mass and opportunistic exploitation at play, any uncovered system ought to be thought-about compromised till confirmed in any other case.”
Cisco this week up to date a February 25 advisory to tell clients in regards to the exploitation of two further Catalyst SD-WAN vulnerabilitieswhich may be exploited by authenticated attackers for privilege escalation: CVE-2026-20128 and CVE-2026-20122.
The corporate has not shared any particulars on the assaults exploiting these vulnerabilities, however its description signifies they’ve been chained with different flaws.
It’s unclear if the identical risk actor is behind the entire campaigns concentrating on Catalyst SD-WAN vulnerabilities. Cisco lately warned {that a} zero-day in Safe Electronic mail Gateway home equipment had been exploited by China-linked hackersbut once more, it’s unclear if the assaults are in any manner associated.
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