New York, February 28, 2026, 14:12 EST — The market has closed.
- Cisco ended Friday’s session up roughly 1.7%, closing at $79.46.
- Cisco laid out its investor calendar for March, with stops at Mobile World Congress and a fireside chat hosted by Morgan Stanley TMT on the agenda.
- Security agencies have flagged that attackers are actively exploiting a critical vulnerability in Cisco Catalyst SD-WAN.
Cisco Systems Inc finished Friday at $79.46, up 1.7%, clawing back the 1.3% it lost in the previous session. The Nasdaq-traded networking company’s shares changed hands between $77.07 and $79.53.
U.S. markets are closed for the weekend, but Cisco faces a potentially volatile Monday. The company is bracing for a series of March conference appearances, plus a new set of government warnings focused on its SD-WAN products—both could quickly sway sentiment.
Cisco plans to hold investor meetings at Mobile World Congress in Barcelona on March 3 and 4. After that, the company heads to San Francisco for the Morgan Stanley TMT conference on March 5, with more investor talks plus a fireside chat scheduled for 10:00 a.m. PST. CFO Mark Patterson and Martin Lund from the Common Hardware Group are set to attend. Cisco emphasized that “no new financial information” is on the agenda for these appearances. Cisco Investor Relations
Stocks cooled off ahead of the weekend, with the S&P 500 losing 0.4% by Friday’s close. The Nasdaq shed 0.9%, while the Dow gave up 1.1%. All three benchmarks finished the week in negative territory.
Cisco shares saw a sizable bump Friday, with volume topping 27.4 million shares—well over the 50-day average. MarketWatch data put the stock around 10% shy of its Feb. 10 high of $88.19.
Singapore’s Cyber Security Agency flagged “active exploitation” of a major Cisco Catalyst SD-WAN authentication-bypass vulnerability on Feb. 26, warning organizations the flaw impacts Catalyst SD-WAN Controller and Manager systems. The bug, tracked as CVE-2026-20127, holds a maximum 10/10 rating on the CVSS scale—a measure of vulnerability severity—and could give unauthenticated attackers full admin rights to alter SD-WAN settings. Cyber Security Agency of Singapore
In an emergency directive reported by ITPro, Madhu Gottumukkala, the acting director at the U.S. Cybersecurity and Infrastructure Security Agency, called for swift response, citing “the ease with which these vulnerabilities can be exploited demands immediate action.” Nick Tausek, Swimlane’s lead security automation architect, flagged that “adversaries are aiming for the control plane, not just individual endpoints.” Moshe Hassan from Upwind weighed in as well: “Patch exposed systems first, or block until you can.” IT Pro
Shareholders are left to wonder if the SD-WAN problem will just need a quick fix, or if it’s about to spill into bigger headaches—think service outages, unhappy customers, or extra expenses down the road. Security lapses might not ding revenue immediately. Still, they often sway customers when it’s time to renew contracts or upgrade systems.
The week kicks off with Cisco’s investor meetings at Mobile World Congress on Tuesday, March 3. Then, on Thursday, March 5, the company heads into its fireside chat at Morgan Stanley’s TMT event.
