CVE-2026-67275 Overview
Dell PowerProtect One contains a Reliance on Insufficiently Trustworthy Component vulnerability ([CWE-1357]) affecting versions 20.1.0.0 and below. An unauthenticated remote attacker can exploit this weakness to achieve cache poisoning against the affected data protection appliance. Successful exploitation requires user interaction and high attack complexity, but no privileges. The flaw affects integrity of cached responses without directly exposing data or halting availability. Dell published advisory DSA-2026-369 to address multiple vulnerabilities in PowerProtect One, including this issue.
Critical Impact
Unauthenticated remote attackers can poison cached content in Dell PowerProtect One, undermining the integrity of responses served by the appliance to downstream users.
Affected Products
- Dell PowerProtect One version 20.1.0.0
- Dell PowerProtect One versions below 20.1.0.0
- Data protection management components bundled with the affected releases
Discovery Timeline
- 2026-08-26 - CVE CVE-2026-67275 published to NVD
- 2026-08-26 - Last updated in NVD database
Technical Details for CVE-2026-67275
Vulnerability Analysis
The vulnerability stems from Dell PowerProtect One relying on a component whose trust properties are insufficient for its security-sensitive role. Attackers can leverage that misplaced trust to introduce attacker-controlled content into a cache consumed by the appliance or its clients. Because caches typically serve subsequent requests without revalidation, a single successful poisoning event can influence multiple downstream interactions.
Exploitation requires that a user interact with the affected surface, such as visiting a resource that triggers the cache lookup. The impact is bounded to integrity: confidentiality and availability are not directly affected. However, integrity loss in a data protection product can propagate into backup workflows, administrative decisions, and trust boundaries around recovery operations.
Root Cause
The root cause is classified as [CWE-1357] Reliance on Insufficiently Trustworthy Component. PowerProtect One accepts or caches content from a source that does not enforce sufficient authenticity or integrity guarantees. Cache validation, response signing, or origin verification are inadequate to prevent attacker-supplied entries from being stored and served.
Attack Vector
The attack vector is network-based and does not require authentication. An attacker crafts a request or resource that, when processed alongside a legitimate user action, causes a malicious response to be cached. Subsequent requests then receive the poisoned entry. Dell has not published proof-of-concept details, and no public exploit code is available. See the Dell Security Update DSA-2026-369 for vendor-supplied technical context.
Detection Methods for CVE-2026-67275
Indicators of Compromise
- Unexpected or inconsistent responses served from PowerProtect One management interfaces to different clients.
- Cache entries or HTTP responses containing content that does not match the origin server's current state.
- Administrator or user reports of anomalous UI content, redirects, or altered resource references.
Detection Strategies
- Compare cached responses against origin responses on a periodic basis to identify divergence.
- Inspect PowerProtect One access and proxy logs for request patterns that manipulate Host, X-Forwarded-*, or cache key headers.
- Alert on requests to the appliance that include unusual header combinations preceding user sessions.
Monitoring Recommendations
- Forward PowerProtect One web and management logs to a centralized analytics platform for correlation.
- Track cache hit ratios and response size distributions for statistical anomalies indicating injected content.
- Monitor administrative activity on PowerProtect One for actions taken shortly after suspicious cache events.
How to Mitigate CVE-2026-67275
Immediate Actions Required
- Apply the fixes described in Dell Security Update DSA-2026-369 to move beyond version 20.1.0.0.
- Restrict network access to the PowerProtect One management interface to trusted administrative networks only.
- Require administrators to access the appliance through fresh browser sessions until patching is complete.
Patch Information
Dell has released a security update for PowerProtect One through advisory DSA-2026-369. Customers running version 20.1.0.0 or earlier should upgrade to the fixed release identified in the advisory. Review the vendor bulletin for the specific fixed version, upgrade paths, and any prerequisite steps for clustered or high-availability deployments.
Workarounds
- Place PowerProtect One behind a reverse proxy that normalizes cache keys and strips untrusted headers such as X-Forwarded-Host.
- Disable or bypass intermediate caches for authenticated administrative traffic until the update is applied.
- Enforce strict network segmentation so only authorized management hosts can reach the appliance.
# Configuration example
# Restrict access to PowerProtect One management interface at the firewall
iptables -A INPUT -p tcp --dport 443 -s 10.0.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
