CVE-2025-34027Disclosure(versa-networks / concerto)

LOWCVSS 9.0 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch versa-networks concerto systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. The Spack upload endpoint can be leveraged for a Time-of-Check to Time-of-Use (TOCTOU) write in combination with a race condition to achieve remote code execution via path loading manipulation, allowing an unauthenticated actor to achieve remote code execution (RCE).This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.

versa-networks CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Exploit / PoC references

Weakness type (CWE)

CWE-367

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

concerto

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-03-05); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

versa-networks

Products

concerto

2 versions affected across 1 product

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

FortiGuard Labs@FortiGuardLabs218d
Disclosure
🚨 New Outbreak Alert: Multiple critical vulnerabilities in #Versa Concerto network security and SD-WAN platform (CVE-2025-34027, CVE-2025-34026, CVE-2025-34025). When chained, attackers can bypass authentication, escape Docker containers, and fully compromise the host system. Get full details and mitigation steps: https://ftnt.net/6011hCPnV 👈
Post summary
The post announces three critical CVEs in Versa Concerto SD‑WAN that, when chained, can bypass authentication, escape Docker containers, and compromise the host, and it directs readers to a link for detailed information and mitigation steps.
01010410
40.9K followersView on X
pdnuclei-bot@pdnuclei_bot125d
Disclosure
🚨 CVE-2025-34027 - critical 🚨 Versa Concerto API Path Based - Authentication Bypass > Authentication bypass in the Versa Concerto API, caused by URL decoding inconsistenci... 👾 https://cloud.projectdiscovery.io/library/CVE-2025-34027 @pdnuclei #NucleiTemplates #cve
Post summary
The post announces a critical authentication bypass in Versa Concerto API, providing technical details but no exploit, PoC, or remediation.
0000081
952 followersView on X

CPE platform detail3 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

3 of 3 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	versa-networks	concerto	-	-	-
App	versa-networks	concerto	12.1.2	-	-
App	versa-networks	concerto	12.2.1	-	-

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