VulnerabilityPublished 18 Feb 2026Updated 23 Feb 2026

CVE-2026-2683: Tsinghua Unigroup Electronic Archives System · Path Traversal

Affects Tsinghua Unigroup Electronic Archives SystemSource CVE Database V5

Public exploit available · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Tsinghua UnigroupElectronic Archives System	Affected =3.2.210802(62532)	Fixed in–

AI-suggested

To mitigate CVE-2026-2683, organizations should first implement strict input validation and sanitization on all user-supplied path parameters to prevent directory traversal sequences such as '../'. Employ allowlisting of permissible file paths and enforce canonicalization of file paths before processing. If source code or configuration access is available, modify the /Using/Subject/downLoad.html handler to restrict file access strictly within intended directories. Network-level mitigations include restricting access to the affected system to trusted internal networks or VPNs, and deploying web application firewalls (WAFs) with rules to detect and block path traversal attempts. Monitor logs for suspicious requests containing traversal patterns. Conduct regular security assessments and penetration tests focused on file access controls. Additionally, implement robust data encryption at rest to reduce impact if unauthorized file access occurs. Maintain up-to-date backups of critical data to enable recovery from potential compromise.

Description

A vulnerability was found in Tsinghua Unigroup Electronic Archives System 3.2.210802(62532). The affected element is an unknown function of the file /Using/Subject/downLoad.html. Performing a manipulation of the argument path results in path traversal. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

The primary impact of CVE-2026-2683 is unauthorized disclosure of sensitive information due to path traversal allowing attackers to read arbitrary files on the affected system. This can lead to exposure of confidential documents, configuration files, credentials, or other sensitive data stored on the server. While the vulnerability does not directly impact system integrity or availability, the information disclosure could facilitate further attacks such as privilege escalation or lateral movement within a network. Organizations relying on Tsinghua Unigroup Electronic Archives System for document management or archival services face risks of data breaches, regulatory non-compliance, and reputational damage. The ease of remote exploitation without authentication increases the threat level, especially in environments with internet-facing deployments. The absence of vendor patches means the vulnerability may persist for extended periods, increasing exposure. Although no known exploits are currently active in the wild, the public availability of exploit details raises the likelihood of future attacks. Overall, the vulnerability poses a moderate risk to confidentiality and organizational security posture.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Feb 2026, 13:39 UTC

Technical details

References

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