CVE-2026-20127

attacker must have netadmin privileges on the affected system. This would require valid credentials or exploitation of CVE-2026-20182 or CVE-2026-20127 . Cisco is not aware of successful exploitation by other methods. Cisco has observed limited cases where the exploitation of this bug resulted in a configuration change pushed to edge devices. Cisco re

lnerability in Cisco products at least two months before the flaw was disclosed, a new Google report warned. Tracked as CVE-2026-20245, this high-severity (CVSS 7.8) privilege escalation vulnerability stems from insufficient validation of user-supplied input in the command-line interface (CLI) of Cisco Catalyst SD-WAN Controller, formerly known as SD-W

Hackers exploited Cisco Catalyst SD-WAN flaw CVE-2026-20245 as a zero-day months before disclosure, enabling privileged command execution. Google-owned Mandiant reported that an unknown threat actor exploited Cisco Catalyst SD-WAN vulnerability CVE-2026-20245 (CVSS base score of 7.8) as a zero-day at least two months before it was publicly disclosed. The flaw allows an authenticated attacker with […]

CVE-2026-20245, the 7th Cisco SD-WAN vulnerability exploited in 2026, was used for months prior to its disclosure and patching.

frastructure at a service provider. After gaining initial access, the threat actor exploited a zero-day vulnerability ( CVE-2026-20245 ) in Cisco Catalyst SD-WAN to escalate privileges from a compromised administrative account to root-level access. The vulnerability stems from the device’s file upload feature lacking the ability to properly filter mali

isco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk Security Impact Rating: Critical CVE: CVE-2026-20127

Cisco warned that CVE-2026-20262, a Catalyst SD-WAN Manager vulnerability allowing arbitrary file writes, is being actively exploited. Cisco confirmed active exploitation of CVE-2026-20262, an arbitrary file write vulnerability affecting Catalyst SD-WAN Manager. CVE-2026-20262 (CVSS score of 6.5) is an arbitrary file write vulnerability in the web interface of Cisco Catalyst SD-WAN Manager. The flaw is […]

Cisco has revealed another Catalyst SD-WAN Manager vulnerability (CVE-2026-20262) that its Product Security Incident Response Team observed being exploited by attackers. But the associated security advisory also states that “the vulnerability was found during internal security testing”, raising the question of how attackers came to exploit it before Cisco had disclosed it publicly. The vulnerability (CVE-2026-20262) Cisco Catalyst SD-WAN Manager (formerly SD-WAN vManage) is the management plane for the entire Cisco SD-WAN fabric. CVE-2026-20262 is … More →

Cisco recently became aware of the exploitation of CVE-2026-20262, a Catalyst SD-WAN Manager zero-day that allows arbitrary file write.

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Cisco Catalyst SD-WAN, Arista Extensible Operating System (EOS), and Google Chromium V8 flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added BerriAI LiteLLM and Check Point Security Gateway flaws to its Known Exploited Vulnerabilities (KEV) catalog. The two flaws added to […]

Cisco warns customers of an actively exploited high-severity vulnerability in Catalyst SD-WAN Manager, an enterprise network management system that has been targeted by hackers multiple times in the past. Located in the command-line interface, the flaw allows authenticated attackers to escalate privileges to root and take over the entire system. The vulnerability, tracked as CVE-2026-20245, […]

Cisco warns of CVE-2026-20245 in SD-WAN Manager, a flaw that can lead to root access via file upload command injection; no patch or workaround yet. Cisco warns of a privilege escalation flaw, tracked as CVE-2026-20245 (CVSS base score of 7.8), in Cisco Catalyst SD-WAN Manager, the platform formerly known as SD-WAN vManage. An authenticated local […]

A 0-day privilege escalation vulnerability (CVE-2026-20245) in Cisco Catalyst SD-WAN Manager that has yet to be patched by Cisco is being leveraged by attackers. “To exploit this vulnerability, an attacker must have netadmin privileges on an affected system. This would require valid credentials or exploitation of CVE-2026-20182 or CVE-2026-20127. Cisco is not aware of successful exploitation by other methods,” the company shared on Thursday. It also said that it has observed “limited cases where the … More →

The vulnerability is tracked as CVE-2026-20245 and it can allow arbitrary command execution as root, but no patch yet.

Cisco has patched yet another Catalyst SD-WAN Controller authentication bypass vulnerability (CVE-2026-20182) that has been exploited as a zero-day by “a highly sophisticated cyber threat actor”. About CVE-2026-20182 CVE-2026-20182 – affecting both Cisco Catalyst SD-WAN Controller (the “brain” of the Cisco Catalyst SD-WAN solution) and Cisco Catalyst SD-WAN Manager (the management plane for the entire SD-WAN fabric) – stems from a flawed peering authentication mechanism. It affects both on-prem and cloud deployments. CVE-2026-20182 was reported … More →

The zero-day, tracked as CVE-2026-20182, has been exploited in targeted attacks by a sophisticated threat actor identified as UAT-8616.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in Cisco Catalyst SD-WAN to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a flaw in Cisco Catalyst SD-WAN, tracked as CVE-2026-20182 (CVSS score of 10.0), to its Known Exploited Vulnerabilities (KEV) catalog. Cisco fixed CVE-2026-20182, a flaw in SD-WAN control […]

nsights The Internet Changes Before the Advisory Drops GreyNoise April 20, 2026 Before Cisco published its advisory for CVE-2026-20127 — a CVSS 10.0 zero-day cited in a Five Eyes joint warning — GreyNoise sensors had already observed eight distinct surges of Cisco-targeting activity. The earliest arrived 39 days before disclosure. Each one came closer

Cisco’s widely deployed Catalyst 9300 Series enterprise switches have four security vulnerabilities, two of which could be chained to cause a denial-of-service outage, infrastructure security company Opswat has revealed. The two most operationally significant are CVE-2026-20114 and CVE-2026-20110, which the researchers found could be chained to make possible a dangerous privilege escalation. Opswat’s Unit 515 […]

A critical vulnerability (CVE-2026-20131) in Cisco Secure Firewall Management Center (FMC) that Cisco disclosed and patched in early March 2026 has been exploited as a zero-day by the Interlock ransomware gang, Amazon CISO and VP of Security Engineering CJ Moses revealed. “Our research [using Amazon’s MadPot system of honeypots] found that Interlock was exploiting this vulnerability 36 days before its public disclosure, beginning January 26, 2026,” he said on Wednesday. CVE-2026-20131 exploited as zero-day for … More →

The US Cybersecurity and Infrastructure Security Agency (CISA) has warned that an authentication bypass vulnerability patched in Ivanti Endpoint Manager (EPM) last month is now being exploited in the wild. The agency has also updated its directive related to two Cisco Catalyst SD-WAN flaws that were also fixed last month after being used in zero-day […]

WatchTowr reports seeing exploitation attempts for CVE-2026-20127 from numerous unique IP addresses.

Cisco warns that two recently patched Catalyst SD-WAN flaws, CVE-2026-20128 and CVE-2026-20122, are already being actively exploited in the wild. Cisco warned customers that threat actors are actively exploiting two recently patched Catalyst SD-WAN vulnerabilities, CVE-2026-20128 and CVE-2026-20122. The networking giant urged organizations to apply the latest security updates to reduce the risk of compromise. […]

CVE-2026-20127 is a critical authentication bypass in Cisco Catalyst SD-WAN that allows remote attackers to gain administrative access to network infrastructure. Learn how to detect exposure and validate remediation using NodeZero Rapid Response.

Cisco has confirmed that two Catalyst SD-WAN Manager vulnerabilities (CVE-2026-20128 and CVE-2026-20122) patched in late February 2025 are being exploited by attackers. The exploited vulnerabilities (CVE-2026-20128, CVE-2026-20122) CVE-2026-20128 is a bug in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager, which could allow an authenticated, local attacker to gain DCA user privileges on an affected system. “To exploit this vulnerability, the attacker must have valid vmanage credentials on the affected system,” Cisco … More →

The networking giant has added the recently patched CVE-2026-20128 and CVE-2026-20122 to the list of exploited vulnerabilities.

For the latest discoveries in cyber research for the week of 2nd March, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Wynn Resorts, a United States-based casino and hotel operator, has confirmed that employee data was accessed following an extortion threat linked to ShinyHunters. The company said operations were not disrupted. Reports indicate […]

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U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Cisco SD-WAN flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added two Cisco SD-WAN flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: This week, Cisco warned of a critical Cisco SD-WAN vulnerability, tracked […]

Cisco SD-WAN vulnerability CVE-2026-20127 has been exploited since 2023 to gain unauthenticated admin access. A critical Cisco SD-WAN vulnerability, tracked as CVE-2026-20127 (CVSS score of 10.0), has been actively exploited since 2023. The flaw affects Catalyst SD-WAN Controller and Manager and allows remote, unauthenticated attackers to bypass authentication and gain full administrative access by sending […]

Already added to CISA’s KEV catalog, the flaw allows attackers to bypass authentication and gain administrative privileges.

Cybersecurity agencies across the Five Eyes alliance have issued an emergency directive warning that a critical Cisco SD-WAN vulnerability is being actively exploited to gain unauthorized access to federal networks. Officials confirmed that threat actors are targeting core SD-WAN control systems —infrastructure that manages traffic across government and enterprise networks — and urged organizations to […]

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A “highly sophisticated” cyber threat actor has been exploiting a zero-day authentication bypass vulnerability (CVE-2026-20127) in Cisco Catalyst SD-WAN Controller (formerly vSmart) and Cisco Catalyst SD-WAN Manager (formerly SD-WAN vManage), Cisco has announced today. The vulnerability was reported by Australian Signals Directorate’s Australian Cyber Security Centre, who said that once the vulnerability was exploited, “the malicious actors add[ed] a rogue peer, and eventually gain[ed] root access to establish long-term persistence in SD-WANs.” “This vulnerability exists … More →