CVE-2026-57909: watchguard watchguard agent Code Injection
CVSS: 9.4v4.0CriticalDeferred
Published 25-08-2026Last modified 26-08-2026
Vulnerability summary
CVE-2026-57909 is a critical (CVSS 9.4) Code Injection vulnerability in watchguard watchguard agent. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.8% of scored vulnerabilities.
CVSS score
9.4/10
010
Critical · v4.0 (CVE.org)EPSS score
0.41%
0%100%
Low · +0.11 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 25-08-2026PublishedVulnerability first disclosed.
- 26-08-2026Last modifiedVulnerability information updated.
Description
A path traversal vulnerability in WatchGuard Agent allows a remote, unauthenticated attacker on an adjacent network to execute arbitrary code on an affected system.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.4Preferred score · CVE.org (CNA)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HSourcesAll 2 agree
- NVDNIST9.4CriticalCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
34%
Versus all other CVEs
30-day change
+0.11 pp
From 0.29% on 21-09-2026
21-09-202621-10-2026
EPSS score0.41%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
- CWE-306Missing Authentication for Critical FunctionThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Affected systems
Watchguard1 product
- watchguard agent< 1.25.13.0000
1 vendor · 1 product
References
1 links- psirt.watchguard.com/CVE-2026-57909Vendor Advisory